1. Bovine coccidiosis in British Columbia, with the description of a parasite. Eimeria canadensis sp. n.;Bruce;JAVMA,1921
2. The oocysts of coccidia of domesticated cattle in Alabama (USA) with description of two new species;Christensen;J. Parasitol.,1941
3. Coccidia in Hereford calves on summer and winter ranges and feedlots in Utah;Fitzgerald;J. Parasitol.,1962
4. Coccidiosis in feeder cattle;Frank;JAVMA,1926
5. Hammond , D. M. 1964 Coccidiosis of cattle. Some unsolved problems