Bibliografia
Principal
- Railway Operation and Control: Pachl, J. 2004 VTD Rail Publishing, Mountlake Terrace, USA, 255 pp.
- Explotación de líneas de ferrocarril: López Pita, A. 2008 Ediciones UPC. ISBN: 8483019566 ISBN-13: 9788483019566
- Railway Engineering: Profillidis, V. 2001 Ed. Avebury