@Article{ MOLINA_Castro-Martinez_CASTRO:341-368,
author = { MARTA MOLINA and Encarnacion Castro-Martinez and ENRIQUE CASTRO MARTINEZ } ,
title = { ELEMENTARY STUDENTS¿ UNDERSTANDING OF THE EQUAL SIGN IN NUMBER SENTENCES },
journal = { Revista Electrónica de Investigación Psicoeducativa y Psicopedagógica },
year = { 2009 },
volume = { 17 },
pages = { 341-368 },
}