Sources d'images
Riese & Müller, www.r-m.de
Babboe, www.babboe.ch
Butchers & Bicycles, www.butchersandbicycles.com
Bakfiets, www. bakfiets.nl
Urban Arrow, www.urbanarrow.com
Larry Vs. Harry, www.larryvsharry.com
Sjoerd van Rooijen, DoubleDutch GmbH
www.bike-innovation.ch
www.wintherbikes.ch