1. Studies on monozygous cattle twins. I. General introduction;Bonnier;Acta agr. suecana.,1946a
2. Studies on monozygous cattle twins. II. Frequency of monozygous twins;Bonnier;Acta agr. suecana.,1946b
3. Identical twin genetics in cattle;Bonnier;Heredity,1948
4. Aids to the identification of monozygotic twins in cattle;Bonnier;J. of hered.,1938
5. Identical twins in dairy cattle;Dry;N. Z. soc. of anim. prod., Proc.,1942