4 literature references for Lecanium cerei Green, 1923:

Author: Ben-Dov, Y.
Year: 1993
Title: A systematic catalogue of the soft scale insects of the world (Homoptera: Coccoidea: Coccidae) with data on geographical distribution, host plants, biology and economic importance. Flora & Fauna Handbook, No. 9.
Author: Kozár, F. & Walter, J.
Year: 1985
Title: Check-list of the Palaearctic Coccoidea (Homoptera).
Source: Folia Entomologica Hungarica
Author: Vieira, R.M.S., Carmona, M.M. & Pita, M.S.
Year: 1983
Title: [On the coccoids of the Madeira Archipelago (Homoptera - Coccoidea).] Sobre os coccideos do Arquipelago da Madeira (Homoptera - Coccoidea).
Source: Boletim do Museu Municipal do Funchal. Madeira
Author: Green, E.E.
Year: 1923
Title: Observations on the Coccidae of the Madeira Islands.
Source: Bulletin of Entomological Research