@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 },

}