@book{437186,
	author = {Verdín Saldaña, J. Jesús. and Martínez Varela, David Uriel,},
	title = {Focus},
	publisher = {El Canto del Ahuehuete : H. Ayuntamiento de San Francisco del Rincón,},
	year = {[2026]},
	address = {León, Guanajuato :}
}