Koteja, J. 1974 On the phylogeny and classification of the scale insects (Homoptera, Coccinea) (discussion based on the morphology of the mouthparts).. Acta Zoologica Cracoviensia 19: 267-325.

Notes: Recognizes four categories higher than family: 1 suborder, 2 superfamily, 3 section, 4 family group; taxonomic discussion.