1. Trager, W., Science183 (1974) 269.
2. Joyner, L.P., in: The Biology of the Coccidia, p. 35. Ed. P.L. Long. University Park Press, Baltimore 1982.
3. Hammond, D.M., in: The Coccidia, p. 45 Eds D.M. Hammond and P.L. Long. University Park Press, Baltimore 1973.
4. Ray, H.N., and Gill, B.S., Ann. trop. Med. Parasit.48 (1954) 8.
5. Gill, B.S., and Ray, H.N., Indian J. vet. Sci.24 (1954) 239.