Reference
Boudjema Samraoui (1993): Short communication — Kurze Mitteilung — En bref Migration of the African Monarch Danaus chrysippus (L.) and the African Migrant Catopsilia florella (Fabr.) in Mauretania (Lepidoptera : Danaidae, Pieridae) – Nota lepidopterologica – 16: 68 - 70.