References
- Allen, A. B., Tribble, L. F., Lasley, J. F. (1959). Inheritance of nipple numbers in swine and the relationship to performance. Research Bulletin 694, University of Missouri.
- Alaehwede, W. T. and Robinson O. W. (1965). Relationship of nipple number to maternal performance in swine J. Animal Sci. 24, 845.
- Becker, W. Q. (1964). Manual of procedures in quantitative genetics. Printed in the U.S.A. Washington State University, Pullman, Washington 70 pp.
- Enfield, F. D. and Rampel W. E. (1961). Inheritance of teat number and the relationship of that number to various traits in swine. J. Animal Sci. 20. 876–879.