Info:

https://www.lanemotormuseum.org/collection/cars/item/citroen-2cv-bicephale-cogolin-replica-1952?highlight=WyJjb2dvbGluIl0=

http://daveburnhamcitroen.com/specials.html

French: http://www.netpompiers.fr/index.php?id=89&dossier=0

Video:

The original:

https://www.youtube.com/watch?v=Y9fP95P2jHo

Lane Motor Museum's "Cogolin" explained and demonstrated:

https://www.youtube.com/watch?v=sS7J982Rf60

Again behind the Lane:

https://www.youtube.com/watch?v=H3x08jgzy9g

The French replica in action:

https://www.youtube.com/watch?v=mwNHIe7tUXw

Picture credit and more pics:

http://www.lanemotormuseum.org/collection/cars/item/citroen-cogolin-1952

https://www.flickr.com/photos/pcslbf/8232770125

https://www.flickr.com/photos/pcslbf/8232770257

https://www.flickr.com/photos/pcslbf/8232769813

https://www.flickr.com/photos/mikerhicks/6613388543

https://www.flickr.com/photos/mikerhicks/8586234459

https://www.flickr.com/photos/paulkelly/3231153354

https://www.flickr.com/photos/paulkelly/3231153354

https://www.flickr.com/photos/raddad/5339261551

https://www.flickr.com/photos/derekgottlieb/2459929005

http://www.pbase.com/dcoleman59/autos_and_parts

http://s132.photobucket.com/user/MadmanOfThePeople/media/100_1977.jpg.html

http://thewandererschuckandkate.blogspot.com/2014/06/unique-and-different-cars-very-different.html

http://paulrobbins.net/lane

http://users.skynet.be/vincent.beyaert/V2004/HIS-Cogolin.htm

http://www.netpompiers.fr/index.php?id=89&dossier=0