Rachel, Gilon;Peter, Demant. The Encyclopedia of the Peoples of the World(en anglès). Nova York:Amiram Gonen,1993,p.703. ISBN 978-0-8050-2256-8.««Bretons (s.d. Breiz) Of the 3 million Bretons who form a distinct component of the French, c.600,000 continue to speak this old Gaelic language (...) The survival of many traditions and customs (bards remembering old songs, musical instruments, costumes, celtic mythology, and pre-Christian element in veneration of saints) may be related to Brittany's economic backwardness.»»
Comunicat de premsa del GRIB (Françoise Morvan), 4 de desembre de 2005 «L'affaire des panneaux». Arxivat de l'original el 2012-02-20.[Consulta: 16 agost 2013].
Comunicat de premsa del GRIB (Françoise Morvan), 4 de desembre de 2005 «L'affaire des panneaux». Arxivat de l'original el 2012-02-20.[Consulta: 16 agost 2013].