José Ramón Hilera Salvador Otón Antonio Ortiz Luis de Marcos José-Javier Martínez José Antonio Gutiérrez José M. Gutiérrez Roberto Barchino Evaluating Simple Query Interface Compliance in Public Repositories. 311-315 2009 ICALT http://dx.doi.org/10.1109/ICALT.2009.89 conf/icalt/2009 db/conf/icalt/icalt2009.html#HileraOOMMGGB09