@Article{ GONZÁLEZ_Rico-Romero_GALLARDO:309-340,
author = { JOSÉ LUIS GONZÁLEZ MARI and Luis Rico-Romero and JESÚS GALLARDO ROMERO } ,
title = { STRUCTURAL AND SEMIOTIC DIVERSITY IN THE DIDACTIC TRANSITION FROM THE NATURAL-NUMBER DOMAIN TO THE INTEGERS: A STUDY OF UNDERSTANDING IN THE FIELD OF ADDITIVE RELATIVITY },
journal = { Revista Electrónica de Investigación Psicoeducativa y Psicopedagógica },
year = { 2009 },
volume = { 7 },
pages = { 309-340 },
}