@Article{ GONZÁLEZ_RICO_Gallardo:309-340,
author = { JOSÉ LUIS GONZÁLEZ MARI and LUIS RICO ROMERO and Jesús Gallardo } ,
title = { Structural and semiotic diversity in the transition from the natural-number domain to the integres: a study of the understanding in the field of additive relativity },
journal = { Electronic Journal of Research in Educational Psychology },
volume = { 17 },
pages = { 309-340 },
}