Evans, A. V.; Hogue, J. N. : A brief History of Beetle , pp. 6
Osborn, H. 1952: A Brief History of Entomology Including Time of Demosthenes and Aristotle to Modern Times with over Five Hundred Portraits. Columbus, Ohio, The Spahr & Glenn Company, 1-303 S., B15: 6024a, pp. 232, Portr. (Taf. 36)