Rotundo, G., & Tremblay, E. 1974 [Study on a sex pheromone of Planococcus citri (Risso) (Homoptera, Coccoidea). II. Extraction.]. Bollettino del Laboratorio di Entomologia Agraria 'Filippo Silvestri'. Portici 31: 121-131.

Notes: Description of laboratory method; result shown in table of comparison.