1. Bratton, R. W., Foote, R. H., and Shipman, K. Procedure for Counting Bovine Sperm with a Hemocytometer, and the Calibration and Operational Use of a Photelometer to Estimate Sperm Count by Optical Density. Routine Lab. Procedure No. 4a, Lab. Animal Breeding, Dept. Animal Husbandry, Cornell University. 1956.
2. Supermatocrit Values in Facilitating the Estimation of Spermatozoa Concentrations;Hickman;J. Dairy Sci.,1958
3. Rapid Methods for Estimating the Number of Spermatozoa in Bull Semen;Salisbury;J. Dairy Sci.,1943
4. The Determination of the Concentration of Spermatozoa in Fowl and Bull Semen;Shaffner;Anat. Record,1943
5. The Determination of Numbers of Spermatozoa in Bull Semen by Measurement of Light Transmission;Willett;J. Animal Sci.,1951