A general approach to solving a wide class of fuzzy optimization problems. - Petr Ekel; Witold Pedrycz; Roland Schinzinger (Fuzzy Sets Syst., 1998)

On delay-dependent robust H∞ control of uncertain continuous-and discrete-time linear systems with lumped delays. - Reinaldo M. Palhares; Cláudio Dias Campos; Michel C. R. Leles; Petr Ekel; Marcos F. S. V. D'Angelo (CDC, 2003)

Fuzzy Coefficients and Fuzzy Preference Relations in Models of Decision Making. - Petr Ekel; Efim A. Galperin; Reinaldo M. Palhares; Cláudio Campos; Marina Silva (KES, 2003)

Cubic algorithm for global optimization with box and equality constraints and application to optimal allocation of resources. - Efim A. Galperin; Petr Yakovlevitch Ekel; J. G. Pereira Jr. (Math. Comput. Model., 2004)

H∞ Guaranteed Cost Computation for Uncertain Time-Delay Systems. - Eduardo N. Gonçalves; Saulo Benchimol Bastos; Reinaldo M. Palhares; Ricardo H. C. Takahashi; Renato Cardoso Mesquita; Cláudio Dias Campos; Petr Ekel (CDC/ECC, 2005)

Fuzzy Logic Based Control of Voltage and Reactive Power in Subtransmission System. - Ana Paula M. Braga; Ricardo Carnevalli; Petr Ekel; Marcelo Gontijo; Marcio Junges; Bernadete Maria de Mendonça Neta; Reinaldo M. Palhares (PReMI, 2005)

Artificial Neural Network Engine: Parallel and Parameterized Architecture Implemented in FPGA. - Milene Barbosa Carvalho; Alexandre Marques Amaral; Luiz Eduardo da Silva Ramos; Carlos Augusto Paiva da Silva Martins; Petr Ekel (PReMI, 2005)

Fuzzy Preference Relations and Multiobjective Decision Making. - Petr Ekel; Carlos Augusto Paiva da Silva Martins; Cláudio Campos; Fernando H. Schuffner Neto; Reinaldo M. Palhares (WSTST, 2005)

Synthetic realization approach to fuzzy global optimization via gamma algorithm. - Efim A. Galperin; Petr Ekel (Math. Comput. Model., 2005)

Parallel Image Segmentation in Reconfigurable Chip Multiprocessors. - Raphael Fonte Boa; Alexandre Marques Amaral; Dulcinéia Oliveira da Penha; Carlos Augusto Paiva da Silva Martins; Petr Ekel (ISPA Workshops, 2006)

RCMP: A Reconfigurable Chip-Multiprocessor Architecture. - Raphael Fonte Boa; Dulcinéia Oliveira da Penha; Alexandre Marques Amaral; Márcio Oliveira Soares de Souza; Carlos Augusto Paiva da Silva Martins; Petr Yakovlevitch Ekel (ISPA Workshops, 2006)

A Parallel Implementation of the Finite Volume Method for the Simulation of the Natural Convection in a Closed Cavity. - Elton F. D. Nogueira; Luiz J. C. Rocha; Alexei Manso Corrêa Machado; Carlos A. M. Pietrobon; Carlos Augusto Paiva da Silva Martins; Rose M. S. Batalha; Petr Ekel (ISPA Workshops, 2006)

Fuzzy set based multiobjective allocation of resources and its applications. - Petr Yakovlevitch Ekel; Carlos Augusto Paiva da Silva Martins; J. G. Pereira Jr.; Reinaldo M. Palhares; Luciane Neves Canha (Comput. Math. Appl., 2006)

Fuzzy preference modeling and its application to multiobjective decision making. - Petr Yakovlevitch Ekel; Marina Silva; Fernando H. Schuffner Neto; Reinaldo M. Palhares (Comput. Math. Appl., 2006)

Algorithms of discrete optimization and their application to problems with fuzzy coefficients. - Petr Yakovlevitch Ekel; Fernando H. Schuffner Neto (Inf. Sci., 2006)

Asymptotic stability analysis in uncertain multi-delayed state neural networks via Lyapunov-Krasovskii theory. - Fernando de Oliveira Souza; Reinaldo M. Palhares; Petr Yakovlevitch Ekel (Math. Comput. Model., 2007)

Models and methods of decision making in fuzzy environment and their applications to power engineering problems. - Luciane N. Canha; Petr Ekel; J. Queiroz; Fernando H. Schuffner Neto (Numer. Linear Algebra Appl., 2007)

Multicriteria analysis in decision making under information uncertainty. - Petr Ekel; José Sidnei Colombo Martini; Reinaldo M. Palhares (Appl. Math. Comput., 2008)

A flexible consensus scheme for multicriteria group decision making under linguistic assessments. - Roberta O. Parreiras; Petr Ekel; José Sidnei Colombo Martini; Reinaldo M. Palhares (Inf. Sci., 2010)

A fuzzy genetic algorithm for automatic orthogonal graph drawing. - Bernadete Maria de Mendonça Neta; Gustavo Henrique Diniz Araújo; Frederico G. Guimarães; Renato Cardoso Mesquita; Petr Yakovlevitch Ekel (Appl. Soft Comput., 2012)

A dynamic consensus scheme based on a nonreciprocal fuzzy preference relation modeling. - Roberta O. Parreiras; Petr Ekel; F. Bernardes Jr. (Inf. Sci., 2012)

Fuzzy set based multicriteria decision making in power engineering problems. - Gladstone Barbosa Alves; Petr Yakovlevitch Ekel; Illya Kokshenev; Roberta O. Parreiras; Fernando H. Schuffner Neto; P. M. N. Souza (IFSA/NAFIPS, 2013)

An in-Field Calibrating Method for the Bilateral Filter Applied to X-ray Flat Panel Grayscale Images with High Spectral Resolution. - Fabiana Oliveira Paixão Fernandes; Cássio Alves Carneiro; Petr Yakovlevitch Ekel; Zélia Myriam Assis Peixoto; Flávia Magalhães Freitas Ferreira (PECCS, 2013)

On multicriteria decision making under conditions of uncertainty. - J. G. Pereira Jr.; Petr Yakovlevitch Ekel; Reinaldo M. Palhares; Roberta Oliveira Parreiras (Inf. Sci., 2015)

A Web-based Decision Support Center for Electrical Energy Companies. - Illya Kokshenev; Roberta O. Parreiras; Petr Yakovlevitch Ekel; Gladstone Barbosa Alves; Stefano V. Menicucci (IEEE Trans. Fuzzy Syst., 2015)

A new fault classification approach applied to Tennessee Eastman benchmark process. - Marcos F. S. V. D'Angelo; Reinaldo M. Palhares; Murilo C. O. Camargos Filho; Renato Dourado Maia; João Batista Mendes; Petr Yakovlevitch Ekel (Appl. Soft Comput., 2016)

Multiobjective and multiattribute decision making in a fuzzy environment and their power engineering applications. - Petr Ekel; Illya Kokshenev; Roberta Oliveira Parreiras; Witold Pedrycz; Joel Pereira Jr. (Inf. Sci., 2016)

An interval space reducing method for constrained problems with particle swarm optimization. - T. M. Machado-Coelho; Alexei Manso Corrêa Machado; Luc Jaulin; Petr Ekel; Witold Pedrycz; Gustavo Luís Soares (Appl. Soft Comput., 2017)

Two-Stage Optimization Combining PSO and TOPSIS for Allocation of Energy Storage in Electric Power Systems. - Samuel Pereriada Rocha; Rafael BambirraPereira; Thiago Melo Machado-Coelho; Petr Yakovlevitch Ekel; Gustavo Luís Soares (CEC, 2018)

Multi-Objective Genetic Algorithm Implemented on a STM32F Microcontroller. - Pedro Henriquede Oliveira Santos; Gustavo Luís Soares; Thiago Melo Machado-Coelho; Bernardo Augusto Godinho de Oliveira; Petr Yakovlevitch Ekel; Flávia Magalhães Freitas Ferreira; Carlos Augusto Paiva da Silva Martins (CEC, 2018)

Forecasting Internet Demand Using Public Data: A Case Study in Brazil. - Matheus Pereira Libório; Thiago Melo Machado-Coelho; Patrícia Bernardes; Alexei Manso Corrêa Machado; Petr Yakovlevitch Ekel; Gustavo Luís Soares (IEEE Access, 2018)

Multicriteria decision making under conditions of uncertainty in application to multiobjective allocation of resources. - Felipe Diniz Ramalho; Petr Yakovlevitch Ekel; Witold Pedrycz; Joel G. Pereira Júnior; Gustavo Luís Soares (Inf. Fusion, 2019)

Structural Equation Modeling Applied to Internet Consumption Forecast in Brazil. - Matheus Pereira Libório; Petr Ekel; Renata de Mello Lyrio; Patrícia Bernardes; Gustavo Luís Soares; Thiago Melo Machado-Coelho (IEEE Access, 2020)

Multiattribute Spatial Decision-Making for Qualitative Information Processing as Applied to the Renewable Energy Generating Sites Prospection. - Lívia Maria Leite Da Silva; Petr Ekel; Douglas A. G. Vieira; Gustavo Luís Soares (IEEE Access, 2020)

Swarm intelligence and fuzzy sets for bed exit detection of elderly. - Laércio Ives Santos; Marcos Flávio Silveira Vasconcelos D'Angelo; Luciana Balieiro Cosme; Heveraldo Rodrigues de Oliveira; João Batista Mendes; Petr Ekel (J. Intell. Fuzzy Syst., 2020)

Expand or Oversize? Planning Internet Access Network in a Demand Growth Scenario. - Matheus Pereira Libório; Petr Ekel; Renata de Mello Lyrio; Patrícia Bernardes; Gustavo Luís Soares; Thiago Melo Machado-Coelho (J. Netw. Syst. Manag., 2020)

Evaluation of Operational Risk in Power Substations and Its Rational Reduction on the Basis of Multicriteria Allocating Resources. - Willian Maia; Petr Ekel; Douglas Alexandre Gomes Vieira; Eduardo Antônio de Castro; Mateus Alberto Dorna de Oliveira; Igor Marques Reis; Kenedy Marconi Geraldo Dos Santos (IEEE Access, 2021)

A benefit-to-cost ratio based approach for portfolio selection under multiple criteria with incomplete preference information. - Eduarda Asfora Frej; Petr Ekel; Adiel Teixeira de Almeida (Inf. Sci., 2021)

Effect of sub-indicator weighting schemes on the spatial dependence of multidimensional phenomena. - Matheus Pereira Libório; João Francisco de Abreu; Petr Iakovlevitch Ekel; Alexei Manso Corrêa Machado (J. Geogr. Syst., 2023)

A fuzzy transformation approach to enhance active learning for heart disease prediction. - Heveraldo Rodrigues de Oliveira; Antônio Wilson Vieira; Laércio Ives Santos; Murilo C. O. Camargos Filho; Petr Ekel; Marcos Flávio Silveira Vasconcelos D'Angelo (J. Intell. Fuzzy Syst., 2024)

Software for building and measuring the quality of composite indicators using ordered weighted averaging: So-called S-CI-OWA. - Laura Cozzi Ribeiro; Matheus Pereira Libório; Hasheem Mannan; Sandro Laudares; Petr Iakovlevitch Ekel; Douglas Alexandre Gomes Vieira; Cristiane Neri Nobre (SoftwareX, 2024)

The Use of Information Entropy and Expert Opinion in Maximizing the Discriminating Power of Composite Indicators. - Matheus Pereira Libório; Roxani Karagiannis; Alexandre Magno Alvez Diniz; Petr Iakovlevitch Ekel; Douglas Alexandre Gomes Vieira; Laura Cozzi Ribeiro (Entropy, 2024)

Fuzzy-Set-Based Multi-Attribute Decision-Making, Its Computing Implementation, and Applications. - Mateus Alberto Dorna de Oliveira; Laura Cozzi Ribeiro; Henrique Silva Schuffner; Matheus Pereira Libório; Petr Iakovlevitch Ekel (Axioms, 2024)

Dealing With Heterogeneous Information in Multi-Criteria Group Decision-Making Problems: A Comprehensive Design Framework. - Matheus Pereira Libório; Petr Ekel; Marcos Flávio Silveira Vasconcelos D'Angelo; Luis Martínez 001; Witold Pedrycz (IEEE Access, 2025)

Constructing Composite Indicators Through Extreme Values Reductions-Ordered Weighted Averaging: Human Development Index. - Matheus Pereira Libório; Petr Ekel; Marcos Flávio Silveira Vasconcelos D'Angelo; Luis Martínez-López 001; Hamidreza Rabiei-Dastjerdi (IEEE Access, 2025)

Book Review: Multicriteria Decision-Making Under Conditions Of Uncertainty: A Fuzzy Set Perspective. John Wiley & Sons. ISBN: 978-1-119-53,492-1. - Petr Iakovlevitch Ekel; Matheus Pereira Libório; Witold Pedrycz (Int. J. Comput. Intell. Syst., 2025)