There’s a new regular London bus route using vintage Routemasters. Time Out London. [2022-10-16]. (原始内容存档于2022-12-19) (英国英语). Buses from Trafalgar Square
Murray (2000), p. 79. Kunz, Richard R. Twin Wires: First U.S. Trolley Buses. Bus World (Sunrise Enterprises). Spring 1986, 8 (3): 26–29. ISSN 0162-9689