to be shunted to the skis for additional pressure, augmenting that gain passively from lift due to their shape. In the alpha-level concept, passenger-only
Frankfurt Motor Show: Audi heads up the A1. 4Car. 18 September 2007 [1 October 2009]. (原始内容存档于2009年7月16日). Next generation VW small car platform to offer
public passenger transport in Frankfurt. vgF. [2013-09-29]. (原始内容存档于2013-10-21). History - The history of local public passenger transport in Frankfurt. vgF