Rotundo, G., & Tremblay, E. 1976a Serumdiagnostic studies in pseudococcids (Homoptera: Coccoidea). II. Planococcus citri (Ris.) and Planococcus ficus (Sign.).. Bollettino del Laboratorio di Entomologia Agraria 'Filippo Silvestri'. Portici 33: 99-107.

Notes: P. citri and ficus compared by serological techniques.