@Article{ GALLARDO_González-marí:10-15,
author = { JESÚS GALLARDO ROMERO and José Luis González-marí } ,
title = { ASSESSING UNDERSTANDING IN MATHEMATICS: STEPS TOWARDS AN OPERATIVE MODEL },
journal = { For the Learning of Mathematics },
year = { 2006 },
volume = { 26 },
pages = { 10-15 },
}