1. G. BAKFR (1972 ). The role ofAnoplolepis longipes(Jerdon) (Hymenoptera:Formicidae) in the entomology of cocoa in the northern District of Papua New Guinea .14th International Congress of Entomology, Canberra, 1972 , p.327 .
2. Invertebrate vectors of Phytophthora palmivora, causing black pod disease of cocoa in Ghana
3. A. M. GORENZ (1970 ). Spreadof Phytophthorapod rot from the tree base to pods in the canopy .Annual Report of the Cocoa Research Institute of Nigeria, 1968-69, pp.53 -54 .