Panis, A. 1974a Modalités de dispersion de Metaphycus helvolus Compere (Hymenoptera, Chalcidoidea, Encyrtidae) laché en un point d'un verger d'agrumes.. IOBC/WPRS Bulletin 1974/3: 131-134.

Notes: Title in English: [Dispersion methods of Metaphycus helvolus Compere (Hymenoptera, Chalcidoidea, Encyrtidae) released in a citrus orchard.] M. helvolus is used for biological control of Coccus hesperidum, Saissetia hemisphaerica, S. miranda, S. neglecta and S. oleae.