Frey, D.G. (1982) The honeycombed species of Chydorus (Cladocera. Chydoridae): Comparison of C. bicornutus and C. bicollaris n. sp. with some preliminary comments of faviformis. Can. J. Zool.60: 1892–1916.
The honeycombed species of _Chydorus_ (Cladocera. Chydoridae): Comparison of _C. bicornutus_ and _C. bicollaris_ n. sp. with some preliminary comments of faviformis