@book{37309,
	author = {Orton, Anthony.},
	title = {Didactica de las matemáticas :},
	publisher = {Morata,},
	year = {2003.},
	address = {Madrid :},
	edition = {4a. Ed.},
	note = {Titulo original: Learning mathematics, issues, Theori and classroom practice \ indice de autores \ indice de materias.}
}