Vilar, J.M.D.S. 1951 Subsidio para o estudo dos Ceroplastes spp. (Insecta - Coccidae) de Portugal. I. [Background study of two Ceroplastes spp. (Insecta - Coccidae) from Portugal. I.]. Broteria. Lisboa 20: 111-136, 177-188.

Notes: First part of a detailed study of the anatomy and biology of C. rusci and C. sinensis.