@Book{BDG201891810154, title = "Elementos de c\'{a}lculo integral", author = "Crusat Prats, Leopoldo", publisher = "Barcelona : Bosch", editor = "Bosch", series = "(Curso de ampliaci\'{o}n de matem\'{a}ticas) (II)", URL = "http://biblioteca.galiciana.gal/es/consulta/registro.do?id=385250", year = "1948", }