Kobayashi, F.; Ross, C. A.; Ross, J. R. P. (2010). Classification, phylogeny, and paleobiogeography of the new subfamily Gifuellinae and a revision of the family Neoschwagerinidae (Superorder Fusulinoida); Guadalupian (middle Permian). The Journal of Foraminiferal Research. 40(3): 283-300.
Classification, phylogeny, and paleobiogeography of the new subfamily Gifuellinae and a revision of the family Neoschwagerinidae (Superorder Fusulinoida); Guadalupian (middle Permian)