Embree, D.G. (1960). "Observations on the Spread of Cyzenis albicans (Fall.) (Tachinidae: Diptera), an Introduced Parasite of the Winter Moth, Operophtera brumata (L.), (Geometridae: Lepidoptera), in Nova Scotia". The Canadian Entomologist. 92 (11): 862–864. doi:10.4039/Ent92862-11. S2CID85171174.
Embree, D.G. (1960). "Observations on the Spread of Cyzenis albicans (Fall.) (Tachinidae: Diptera), an Introduced Parasite of the Winter Moth, Operophtera brumata (L.), (Geometridae: Lepidoptera), in Nova Scotia". The Canadian Entomologist. 92 (11): 862–864. doi:10.4039/Ent92862-11. S2CID85171174.