Reference
Ulf Eitschberger (2008): REM-Bilder der Eier von vier Daphnis Hübner, [1819]-Arten: Daphnis dohertyi Rothschild, 1897 Daphnis hayesi Cadiou, 1988 Daphnis placida (Walker, 1856) Daphnis vriesi Hogenes & Treadaway, 1993 (Lepdidoptera, Sphingidae) – Neue Entomologische Nachrichten – 62: 120 - 125.