James Oberg, "Chapter 6, The Sirius Mystery", in UFOs and Outer Space Mysteries, (1982) Donning Press. "The antiquity of the Dogon astronomy is not so obvious as ancient astronaut enthusiasts claim but neither has it been disproved."
Walter E. A. van Beek: "Dogon Restudied: A Field Evaluation of the Work of Marcel Griaule." Current Anthropology, 32 (1991): 139-167, PDF at home.iscte-iul.pt
