@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 },

}