@Article{ GALLARDO_GONZÁLEZ:10-15,

author = { JESÚS GALLARDO ROMERO and JOSÉ LUIS GONZÁLEZ MARI } ,

title = { ASSESSING UNDERSTANDING IN MATHEMATICS: STEPS TOWARDS AN OPERATIVE MODEL },

journal = { FOR THE LEARNING OF MATHEMATICS },

year = { 2006 },

volume = { 26 },

issn = { 0228-0671 },

pages = { 10-15 },

}