1. Atkinson, W. B.: Studies on the effects of steroid-sex-hormones on alkaline phosphatase in the endometrium. In E. T.Engle, Menstruation and its disorders. Springfield, Ill. 1950.
2. Bargmann, W.: Histologie und mikroskopische Anatomie beim Menschen. Stuttgart: Georg Thieme 1959.
3. Bartelmez, G. W.: The human uterine mucous membrane during menstruation. Amer. J. Obstet. Gynec.21, 623 (1931).
4. ?: Histologic studies on the menstruating mucous membrane of the human uterus. Contr. Embryol. Carneg. Instn124, 141 (1933).
5. ?: Menstruation. Physiol. Rev.17, 28 (1937).