Chapuys, Sébastien (24 November 2009). "Que de la gueule: Une affaire d'État" [Word of mouth: Une affaire d'Etat]. Critikat.com (in French). Archived from the original on 5 January 2011. Retrieved 10 August 2010.
"Article 7-3"(PDF). Cahier des charges de la Régie autonome des transports parisiens [Specifications of the RATP] (in French). STIF. 22 November 2005. p. 18. Archived from the original(PDF) on 13 January 2011. Retrieved 10 August 2010. {{cite book}}: |work= ignored (help)
"Article 7-3"(PDF). Cahier des charges de la Régie autonome des transports parisiens [Specifications of the RATP] (in French). STIF. 22 November 2005. p. 18. Archived from the original(PDF) on 13 January 2011. Retrieved 10 August 2010. {{cite book}}: |work= ignored (help)
"Les Randonneurs". l2tc.com (in French and English). Archived from the original on 13 July 2011. Retrieved 10 August 2010.
Chapuys, Sébastien (24 November 2009). "Que de la gueule: Une affaire d'État" [Word of mouth: Une affaire d'Etat]. Critikat.com (in French). Archived from the original on 5 January 2011. Retrieved 10 August 2010.