Morton, M. Art's "contest with nature": Darwin, Haeckel, and the scientific art history of Alois Riegl / Marsha Morton. Darwin and theories of aesthetics and cultural history.(2013).

Morton, Marsha. "Art's "Contest with Nature": Darwin, Haeckel, and the Scientific Art History of Alois Riegl / Marsha Morton." Darwin and Theories of Aesthetics and Cultural History.(2013) .

Morton, Marsha. "Art's "Contest with Nature": Darwin, Haeckel, and the Scientific Art History of Alois Riegl / Marsha Morton." Darwin and Theories of Aesthetics and Cultural History.(2013), .