@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 },

}