On aggregate Farrell efficiencies. - Rolf Färe; Valentin Zelenyuk (Eur. J. Oper. Res., 2003)

Aggregation of Malmquist productivity indexes. - Valentin Zelenyuk (Eur. J. Oper. Res., 2006)

Extending Färe and Zelenyuk (2003). - Rolf Färe; Valentin Zelenyuk (Eur. J. Oper. Res., 2007)

Comparative analysis of banking production frameworks in eastern european financial markets. - Karligash Kenjegalieva; Richard Simper; Tom Weyman-Jones; Valentin Zelenyuk (Eur. J. Oper. Res., 2009)

Aggregation of economic growth rates and of its sources. - Valentin Zelenyuk (Eur. J. Oper. Res., 2011)

A scale elasticity measure for directional distance function and its dual: Theory and DEA estimation. - Valentin Zelenyuk (Eur. J. Oper. Res., 2013)

Aggregation of Malmquist productivity indexes allowing for reallocation of resources. - Andreas Mayer; Valentin Zelenyuk (Eur. J. Oper. Res., 2014)

Directional vs. Shephard's distance functions. - Valentin Zelenyuk (Optim. Lett., 2014)

Decomposing profit efficiency using a slack-based directional distance function. - Rolf Färe; Hirofumi Fukuyama; Shawna Grosskopf; Valentin Zelenyuk (Eur. J. Oper. Res., 2015)

Aggregation of scale efficiency. - Valentin Zelenyuk (Eur. J. Oper. Res., 2015)

Pricing of decision-making units under non-constant returns to scale. - Rolf Färe; Valentin Zelenyuk (J. Oper. Res. Soc., 2015)

Generalized nonparametric smoothing with mixed discrete and continuous data. - Degui Li; Léopold Simar; Valentin Zelenyuk (Comput. Stat. Data Anal., 2016)

How relevant is the choice of risk management control variable to non-parametric bank profit efficiency analysis? The case of South Korean banks. - Richard Simper; Maximilian J. B. Hall; WenBin Liu; Valentin Zelenyuk; Zhongbao Zhou (Ann. Oper. Res., 2017)

Nonparametric estimation of dynamic discrete choice models for time series data. - Byeong U. Park; Léopold Simar; Valentin Zelenyuk (Comput. Stat. Data Anal., 2017)

Data envelopment analysis, truncated regression and double-bootstrap for panel data with application to Chinese banking. - Kai Du; Andrew C. Worthington; Valentin Zelenyuk (Eur. J. Oper. Res., 2018)

Central Limit Theorems for Aggregate Efficiency. - Léopold Simar; Valentin Zelenyuk (Oper. Res., 2018)

Weak disposability in nonparametric production analysis: A new taxonomy of reference technology sets. - Manh D. Pham; Valentin Zelenyuk (Eur. J. Oper. Res., 2019)

A Unifying Framework for Farrell Profit Efficiency Measurement. - Rolf Färe; Xinju He; Sung Ko Li; Valentin Zelenyuk (Oper. Res., 2019)

Combining the Virtues of Stochastic Frontier and Data Envelopment Analysis. - Christopher F. Parmeter; Valentin Zelenyuk (Oper. Res., 2019)

Improving finite sample approximation by central limit theorems for estimates from Data Envelopment Analysis. - Léopold Simar; Valentin Zelenyuk (Eur. J. Oper. Res., 2020)

Aggregation of inputs and outputs prior to Data Envelopment Analysis under big data. - Valentin Zelenyuk (Eur. J. Oper. Res., 2020)

Sequential data envelopment analysis. - Rolf Färe; Valentin Zelenyuk (Ann. Oper. Res., 2021)

Data sharpening for improving central limit theorem approximations for data envelopment analysis-type efficiency estimators. - Bao-Hoang Nguyen; Léopold Simar; Valentin Zelenyuk (Eur. J. Oper. Res., 2022)

Inference for aggregate efficiency: Theory and guidelines for practitioners. - Léopold Simar; Valentin Zelenyuk; Shirong Zhao (Eur. J. Oper. Res., 2024)

Russell and slack-based measures of efficiency: A unifying framework. - Valentin Zelenyuk; Shirong Zhao (Eur. J. Oper. Res., 2024)

Statistical Inference for Aggregation of Malmquist Productivity Indices. - Manh D. Pham; Léopold Simar; Valentin Zelenyuk (Oper. Res., 2024)

Generalized theory for measuring efficiency of individuals and groups. - Valentin Zelenyuk; Valentyn Panchenko (Ann. Oper. Res., 2024)

Likelihood-ratio test for technological differences in two-stage data envelopment analysis for panel data. - Kai Du; Valentin Zelenyuk (Eur. J. Oper. Res., 2025)

Goodness-of-fit in production models: A Bayesian perspective. - Mike Tsionas; Valentin Zelenyuk; Xibin Zhang (Eur. J. Oper. Res., 2025)