@Article{ RICO_LUPIÁÑEZ:239-242,
author = { LUIS RICO ROMERO and JOSÉ LUIS LUPIÁÑEZ GÓMEZ } ,
title = { RESEARCH IN MATHEMATICS EDUCATION: NUMERICAL THINKING },
journal = { ELECTRONIC JOURNAL OF RESEARCH IN EDUCATIONAL PSYCHOLOGY },
year = { 2009 },
pages = { 239-242 },
}