Lenssen-Erz, T. The dark ages of picturing: Does art originate from caves? A synopsis / Tilman Lenssen-Erz. Origins of pictures : anthropological discourses in image science.(2013).
Lua i Stíl Chicago (17ú heag.)Lenssen-Erz, Tilman. "The Dark Ages of Picturing: Does Art Originate from Caves? A Synopsis / Tilman Lenssen-Erz." Origins of Pictures : Anthropological Discourses in Image Science.(2013) .
Lua MLA (8ú heag.)Lenssen-Erz, Tilman. "The Dark Ages of Picturing: Does Art Originate from Caves? A Synopsis / Tilman Lenssen-Erz." Origins of Pictures : Anthropological Discourses in Image Science.(2013), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.