@inproceedings{ Segovia-Alex_Rico-Romero_CASTRO:861-869,

author = { Isidoro Segovia-Alex and Luis Rico-Romero and ENRIQUE CASTRO MARTINEZ } ,

title = { STRATEGIES FOR THE ESTIMATION OF DISCREET QUANTITIES: A FIRST STUDY ON ABILITIES },

booktitle = { ANNUAL MEETING OF THE NORTH AMERICA CONFERENCE FOR THE PSYCHOLOGY OF MATHEMATICS EDUCATION (21.1999.MORELOS, MÉXICO) },

year = { 1999 },

pages = { 861 - 869 },

location = { MORELOS, MÉXICO },

}