[9] Análisis de Variabilidad con Modelos de Objetivos (Bruno González-Baixauli, Miguel A. Laguna, Julio Cesar Sampaio do Prado Leite), In Anais do WER04 – Workshop em Engenharia de Requisitos, Tandil, Argentina, ISBN 950-658-147-9 (Luiz Marcio Cysneiros Marcela Ridao, ed.), 2004.  [pdf]
[8] Aplicaciones de la Teoria de Constructos Personales a la Elicitacion de Requisitos (Bruno González-Baixauli, Miguel A. Laguna, Julio Cesar Sampaio do Prado Leite), In IX Jornadas Ingenieria del Software y Bases de Datos (JISBD 2004), Malaga, Spain ISBN: 84-688-8983-0 (Hernesto Pimentel Juan Hernandez, ed.), 2004.  [pdf]
[7] Un Framework para la Reutilizacion de la Definicion de Refactorizaciones (Yania Crespo, Carlos López, Raúl Marticorena), In IX Jornadas Ingenieria del Software y Bases de Datos (JISBD 2004), Malaga, Spain ISBN: 84-688-8983-0 (Hernesto Pimentel Juan Hernandez, ed.), 2004.  [pdf]
[6] Visual Variability Analysis for Goal Models (Bruno González-Baixauli, Julio Cesar Sampaio do Prado Leite, John Mylopolous), In 12th IEEE International Conference on Requirements Engineering (RE 2004), Kyoto, Japan, ISBN 0-7695-2174-6, IEEE Computer Society, 2004.
[5] Finding Early Indicators of UML Class Diagrams Understandability and Modifiability (Marcela Genero, Mario Piattini, Esperanza Manso), In 2004 International Symposium on Empirical Software Engineering (ISESE 2004) , Redondo Beach, CA, USA. , ISBN 0-7695-2165-7, IEEE Computer Society, 2004.
[4] Reuse, Standardization, and Transformation of Requirements (Miguel A. Laguna, Oscar López, Yania Crespo), In Software Reuse: Methods, Techniques and Tools: 8th International Conference, ICSR 2004, Madrid, Spain, ISBN 3-540-22335-5, Springer, 2004.
[3] Model Language and Framework Support for Refactoring Reuse (Carlos López, Raúl Marticorena, Yania Crespo), In Software Reuse: Methods, Techniques and Tools: 8th International Conference, ICSR 2004, Madrid, Spain, ISBN 3-540-22335-5, 2004.  [pdf]
[2] Estudio de la Distribución Docente de Pruebas del Software y Refactoring para la Incorporación de Metodologías Ágiles (Raúl Marticorena, Carlos López, Yania Crespo), In Actas de las X Jornadas de Enseñanza Universitaria en Informática JENUI 2004. Alicante, 2004.  [pdf]
[1] Product Line Requirements based on Goals, Features and Use cases (Bruno González-Baixauli, Miguel A. Laguna, Yania Crespo), In International Workshop on Requirements Reuse in System Family Engineering (IWREQFAM), 2004. (http://polaris.dit.upm.es/%7Eiwreqfam/)  [pdf]