@Article{ RUIZ_LUPIÁÑEZ:397-424,
author = { ELENA FABIOLA RUIZ LEDESMA and JOSÉ LUIS LUPIÁÑEZ GÓMEZ } ,
title = { DETECTING PSYCHOLOGICAL OBSTACLES TO TEACHING AND LEARNING THE TOPICS OF RATIO AND PROPORTION IN SIXTH GRADE PRIMARY PUPILS },
journal = { ||ELECTRONIC JOURNAL OF RESEARCH IN EDUCATIONAL PSYCHOLOGY|| },
year = { 2009 },
volume = { 17 },
issn = { 1696-2095 },
pages = { 397-424 },
doi = { http://www.investigacion-psicopedagogica.org/revista/new/english/index.php?n=17 },
}