Pérez Yuste, Antonio and Perez Sanjuan, Olga (2009). "Cuerpo de Telégrafos": First Attempts to Create a Professional Body for Electrical Communications in Spain. In: "IEEE Conference on the History of Technical Societies 2009", 05/08/2009 - 07/08/2009, Philadelphia, USA. ISBN 978-1-4244-5119-7.