Regitz-Zagrosek V (2 October 2012). Sex and Gender Differences in Pharmacology. Springer Science & Business Media. pp. 549–. ISBN978-3-642-30725-6. The first sex steroid used as pharmacological agent was Progynon, first sold by Schering AG in 1928. [...]
Booth D (2 November 1983). "Estrone". In Florey K (ed.). Analytical Profiles of Drug Substances. Vol. 12. Academic Press. pp. 136–. ISBN978-0-08-086107-4.
Streck A (1928). ""Progynon"-Schering, ein Neues Zyklus-Hormonpräparat" ["Progynon"-Schering, a new cycle hormone preparation]. Klinische Wochenschrift (in German). 7 (25): 1172–1178. doi:10.1007/BF01738283. ISSN0023-2173. S2CID35945534.
Collip JB, Browne JS, Thomson DL (1934). "The Chemical Nature of Emmenin". Endocrinology. 18 (1): 71–74. doi:10.1210/endo-18-1-71. ISSN0013-7227.
Macfarlane C (1936). "Observations on the use of Collip's emmenin in the menopause". American Journal of Obstetrics and Gynecology. 31 (4): 663–666. doi:10.1016/S0002-9378(36)90468-4. ISSN0002-9378.
Streck A (1928). ""Progynon"-Schering, ein Neues Zyklus-Hormonpräparat" ["Progynon"-Schering, a new cycle hormone preparation]. Klinische Wochenschrift (in German). 7 (25): 1172–1178. doi:10.1007/BF01738283. ISSN0023-2173. S2CID35945534.
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Streck A (1928). ""Progynon"-Schering, ein Neues Zyklus-Hormonpräparat" ["Progynon"-Schering, a new cycle hormone preparation]. Klinische Wochenschrift (in German). 7 (25): 1172–1178. doi:10.1007/BF01738283. ISSN0023-2173. S2CID35945534.
Collip JB, Browne JS, Thomson DL (1934). "The Chemical Nature of Emmenin". Endocrinology. 18 (1): 71–74. doi:10.1210/endo-18-1-71. ISSN0013-7227.
Macfarlane C (1936). "Observations on the use of Collip's emmenin in the menopause". American Journal of Obstetrics and Gynecology. 31 (4): 663–666. doi:10.1016/S0002-9378(36)90468-4. ISSN0002-9378.