@Article{ GONZÁLEZ_RICO_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 = { ||ELECTRONIC JOURNAL OF RESEARCH IN EDUCATIONAL PSYCHOLOGY|| },
year = { 2009 },
volume = { 7(1) },
issn = { 1696-2095 },
pages = { 309-340 },
}