Aeon/Quadro 350 D (2011-present): Three wheeler stability | moto-choice.com
Quadro 350D - YouTube
Quadro Vehicles on Twitter: "Italian designed Quadro 350D now available across Europe. Choice of 3 colours: Matt Black, Silver or White http://t.co/0WqT9n6V" / Twitter
Dreirad im Quadrat – Motoretta
File:HTS (Hydraulic Tilting System) im Quadro 350D.png - Wikimedia Commons
Roller-Fahrbericht Quadro 350D: Die unheimliche Begegnung mit dem dritten Rad - Magazin