1. The ‘delayed flagellum’ of millipede sperm is a reacted acrosome (The spermatozoon of Arthropoda. XVIII);Baccetti B.;J. submicrosc. Cytol.,1977
2. Barnett M.(1991).Genital morphology of the millipede Orthoporus pyrhocephalus (Diplopoda: Spirostreptidae): evolutionary implications and a probable mechanism of sperm displacement.Honours project University of Cape Town.
3. Millipedes. Keys and notes for the identification of the species;Blower J. G.;Synopses Br. Fauna (N.S.),1985