1. Notes on the Destruction of Kumaras from the Friendly Islands (Tonga) caused by an Imported Weevil, with Descriptions of the Larva, Pupa and Perfect Insect;Broun;Trans and Proc. New Zealand Inst.,1907
2. de Bussy , L. P. Bewaren van Obi tjina, Circularis 18, Deli Proefstation Dec 1914
3. Dominio del Gorgoio o Piche de la Batato (Cylas formicarius);Crespo;Rev. Agr. Santo Domingo R. D.,1919