F. Eichler and G. Friese, “Ergebnisse der Albanien-Expedition 1961 des Deutschen Entomologischen Institutes. 32. Beitrag. Lepidoptera: Sphingidae”., contrib.entomol., vol. 15, no. 5-6, pp. 633–640, Dec. 1965, doi: 10.21248/contrib.entomol.15.5-6.633-640.