@Article{ MOLINA_Castro-_Mason-:75-86,

author = { MARTA MOLINA and Encarnación Castro- and John H. Mason- } ,

title = { ELEMENTARY STUDENTS APPROACHES TO SOLVING TRUE/FALSE NUMBER SENTENCES },

journal = { PNA },

year = { 2008 },

volume = { 2 },

pages = { 75-86 },

doi = { www.pna.es },

}