* Zhao P, Qi XH, Crous PW, Duan WJ, Cai L (2020) Gymnosporangium species on Malus: species delineation, diversity and host alternation. Persoonia 45(1), 68-100.
------- Telial host.
* Hepting GH (1971) Diseases of forest and shade trees of the United States. Agriculture Handbook No. 386. USDA, Washington, USA.
* Stoeckeler JH, Slabaugh PE (1965) Conifer nursery practice in the prairie-plains. Agriculture Handbook No. 279. USDA, Washington, USA. 93 pp.
------- as Rocky Mountain juniper
* Zhao P, Qi XH, Crous PW, Duan WJ, Cai L (2020) Gymnosporangium species on Malus: species delineation, diversity and host alternation. Persoonia 45, 68-100.
------- from the molecular and morphological study of herbarium specimens.
* Clark SM, LeDoux DG, Seeno TN, Riley EG, Gilbert AJ, Sullivan JM (2004) Host plants of leaf beetle species occurring in the United States and Canada (Coleoptera: Megalopodidae, Orsodacnidae, Chrysomelidae, excluding Bruchinae). Coleopterists Society, Special Publication 2, 615 pp.
------- Adult host.
* Brito R, Specht A, Gonçalves GL, Moreira GRP, Carneiro E, Santos FL, Roque-Specht VF, Mielke OHH, Casagrande MM (2019) Spodoptera marima: a new synonym of Spodoptera ornithogalli (Lepidoptera: Noctuidae), with notes on adult morphology, host plant use and genetic variation along its geographic range. Neotropical Entomology 48(3), 433-448.
* Heppner JB (2007) Lepidoptera of Florida. Part 1. Introduction and catalog. Gainesville, Florida Department of Agriculture & Consumer Services, p 670.
