Verzijl, Jan Hendrik Willem; W.P. Heere; J.P.S. Offerhaus (1979). International Law in Historical Perspective. Martinus Nijhoff. pp. 230–234, 237. ISBN978-90-286-0158-1. Online, Google Books entry
Harald Fischer-Tiné (2003). “'White women degrading themselves to the lowest depths': European networks of prostitution and colonial anxieties in British India and Ceylon ca. 1880–1914”. Indian Economic and Social History Review40 (2): 163–90 [175–81]. doi:10.1177/001946460304000202.