Object Oriented Metamodel of Systems Administrative Production Process. - Leonardo Contreras; Jorge Molero; Antonio Sucre (ISAS-SCI (1), 2001)

Web based design of virtual teaching in the laboratory of automatic control. - Ernesto Granado; William Colmenares; S. De Santis; Leonardo Contreras; Omar Pérez (ECC, 2003)

An ontology-based intelligent system for recruitment. - Francisco García-Sánchez 001; Rodrigo Martínez-Béjar; Leonardo Contreras; Jesualdo Tomás Fernández-Breis; Dagoberto Castellanos Nieves (Expert Syst. Appl., 2006)

Ontologies Integration for University Institutions: Approach to an Alignment Evaluation. - Richard Gil; Ana María Borges; Luís Ramos; Leonardo Contreras (Australian Software Engineering Conference, 2008)

Improving Ontologies through Ontology Learning: a University Case. - Richard Gil; Ana María Borges; Leonardo Contreras; María J. Martín-Bautista (CSIE (4), 2009)

A Systemic Methodology for Ontology Learning - An Academic Case Study and Evaluation. - Richard Gil; Leonardo Contreras; María J. Martín-Bautista (KEOD, 2010)

Applying an Ontology Learning Methodology to a Relational Database: University Case Study. - Richard Gil; María J. Martín-Bautista; Leonardo Contreras (ICSC, 2010)

Re-diseño de un sistema recomendador de estudios basado en minería web semántica. - Marla Corniel; Richard Gil; Ana María Borges; Leonardo Contreras; José Ferrer; Jorge Molero (Rev. Avances en Sistemas Informática, 2011)