1. Genetic variation and covariation for ewe reproduction, lamb growth, and lamb scrotal circumference in a fall-lambing sheep flock.
2. Variation in ovulation rate and litter size of Cambridge sheep
3. K. G. Boldman, L. A. Kriese, L. D. Van Vleck, and S. D. Kachman, 1993 A manual for use of MTDFREML. A set of programs to obtain estimates of variances and covariances. U.S. Department of Agriculture, Agricultural Research Service, Lincoln, NE.
4. N. M. Fogarty, and A. R. Gilmour, 1998 Effect of season on lambing performance of selection and control flock ewes tested in an 8-monthly lambing system. In: Proceedings of the 6th World Congr. Genet. Appl. Livest. Prod., Armidale, 27, 55, 58 .