Grandjean. Grandjean, Charles, "Flatters", Imago Mundi (in French), retrieved 2017-09-03
frenchbooksonindia.com
Wahl 1896, p. 113. Wahl, Maurice (1896), "La France au Sahara", La France aux colonies(PDF) (in French), Paris: Ancienne Maison Quantin, retrieved 2017-09-25