1. A study of the fern-like crystalline patterns of the cervical and vaginal mucus of cattle;Abusineina;Vet. Rec.,1962
2. Variation of inorganic phosphorus concentration in the cervicovaginal mucus of cows during the oestrus cycle;Baksai;Acta vet. Acad. Sc. Hung.,1967
3. Baksai , E. H. A. M. Osman 1969
4. Steroids 11, 89, cited by Norman, R. L., and B. E. Eleftheriou, 1968: Free plasma estrogens in the ewe during the estrous cycle;Eleftheriou;Steroids,1968
5. La Nuova Veterinaria, 201, cited by Horváth, G., 1960: Diagnostic significance of the crystallization of cervical mucus;Fedrigo;Acta vet. Hung.,1955