Viggiani, G. 1985 [Phenology, natural enemies and control of Quadraspidiotus ostraeformis Curtis (Homoptera: Diaspididae) on filbert].. Bollettino del Laboratorio di Entomologia Agraria 'Filippo Silvestri'. Portici 42: 3-9.

Notes: This oyster-shell scale causes severe infestations on filbert; biology; natural enemies include Chilocorus bipustulatus and Archenomus longiclava.