@book{435387,
	author = {Barahona Echeverría, Ana and Àlvarez Jiménez, Carlos},
	title = {La continuidad en las ciencias},
	publisher = {Universidad Nacional Autónoma de México (UNAM),},
	year = {2002 ;},
	series = {Texto Cientifico Universitario},
	address = {México :}
}