@book{421,
	author = {Espinosa Malea, José Manuel  and Enrique F. Belenguer Balaguer },
	title = {Problemas Resueltos de Circuitos Magnéticos y Transformadores },
	publisher = {Universitat Jaume, },
	year = {2004.},
	address = {Castellón de la Plana, España: }
}