Knipscher, R.G., Miller, D.R., & Davidson, J.A. 1976 Biosystematics of Chionaspis nyssae Comstock (Homoptera: Diaspididae) with evidence supporting leaf and bark dimorphism of the scale.. Melanderia 25: 30.

Notes: Describes all stages of females and males; life history; taxonomic notes; C. nyssae compared with C. americana and C. kosztarabi.