@Article{ Villegas-Castellanos_CASTRO_GUTIERREZ:279-308,
author = { José Luis Villegas-Castellanos and ENRIQUE CASTRO MARTINEZ and JOSE GUTIERREZ PEREZ } ,
title = { REPRESENTATIONS IN PROBLEM SOLVING A CASE STUDY WITH OPTIMIZATIONS PROBLEMS },
journal = { Revista Electrónica de Investigación Psicoeducativa y Psicopedagógica },
year = { 2009 },
volume = { 17 },
pages = { 279-308 },
doi = { http://www.investigacion-psicopedagogica.org/revista/new/english/contadorarticulo.php?297 },
}