@Article{ MOLINA_CASTRO_RUIZ:341-368,
author = { MARTA MOLINA and ENCARNACION CASTRO MARTINEZ and FRANCISCO RUIZ FERRON } ,
title = { ELEMENTARY STUDENTS¿ UNDERSTANDING OF THE EQUAL SIGN IN NUMBER SENTENCES },
journal = { ||ELECTRONIC JOURNAL OF RESEARCH IN EDUCATIONAL PSYCHOLOGY|| },
year = { 2009 },
volume = { 17 },
issn = { 1696-2095 },
pages = { 341-368 },
}