1. Reproductive physiology of the chimpanzee;Graham,1970
2. Symptoms and hormonal changes accompanying ovulation;Billings;Lancet,1972
3. The chemical and physical characteristics of the cervical secretion and its role in reproductive physiology;Gibbons,1971
4. Constituents of fern formation in human cervical mucus;Singh;Medikon,1976
5. Detection of ovulation by color changes in cervical mucus of crab eating macaque (M. fascicularis);Ferrari;Int J Fertil,1972