^Roberts, Peter (1974). “Carriage to Car”. Veteran and Vintage Cars. London, UK: Octopus Books. p. 111. ISBN0-7064-0331-2. "Torpedo – Continental term for an open four-seat car with soft hood and sporting tendencies and in which the line of the bonnet was continued back to the rear of the car."
^Wood, Jonathan (2008). Coachbuilding – The Hand Crafted Car Body. Oxford, UK: Shire Publications. ISBN978-0-7478-0688-2
^Brunninge, Olof (2007). “1, Scania's bonneted trucks”. In Lerpold, Lin; Ravasi, Davide; van Rekom, Johan et al.. Organizational Identity in Practice. Abingdon, Oxford, UK: Routledge. p. 24. ISBN978-0-415-39839-8. https://books.google.com/books?id=Jh3Y18pudt8C&pg=PA24. "When cabs were modularized in the 2-series in 1980, the first version to be launched was the bonneted cab, the so-called T-cab, with a torpedo-like design."
^Peck, Colin (2010). “The 1950s – new factories, new trucks and buses”. DAF Trucks Since 1949. Poundbury, Dorset, UK: Veloce Publishing. p. 19. ISBN978-1-845842-60-4. https://books.google.com/books?id=1q2-Wvd2eX0C&pg=PA17. "To meet the more conservative demands of specific sectors of the market, DAF introduced its first bonneted truck in 1957, with mechanical specifications similar to the cab-over-engine models. Generically known as the 'Torpedo' series, these new trucks were initially supplied as a chassis and bonnet, allowing coachbuilders to construct the cabs."