(18 August 2008). Onderzoek naar ruimere afwerkplek, Algemeen Dagblad (in Dutch) (article states prostitutes are reporting that the stalls in the Utrecht facility are too small for some luxury cars and SUVs, as the facility has remained mostly unchanged since its construction in 1986)
Francis, Jessica (25 August 2010). Zürcher prüfen Sex-Boxen für den Strassenstrich (Zurich Considers Sex Boxes For Street Prostitution), Blick (in German) ("Sie sehen aus wie Autowasch-Anlagen … Einziger Unterschied: Wenn er rausfährt ist sein Auto noch immer schmutzig, er hingegen glücklich." which can be translated as, "they look like car washes … the only difference: when he leaves the car is still dirty, but he is happy.")
Swaan, Abram de (2001). "English in the Social Sciences". In Ulrich Ammon (ed.). The Dominance of English As a Language of Science: Effects on Other Languages and Language Communities. Walter de Gruyter. p. 76. ISBN978-3-11-016647-7.
