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Hall PE (August 1998). "New once-a-month injectable contraceptives, with particular reference to Cyclofem/Cyclo-Provera". Int J Gynaecol Obstet. 62 (Suppl 1): S43–56. doi:10.1016/S0020-7292(98)00090-3. PMID9806239. S2CID2826689.
Newton JR, D'arcangues C, Hall PE (1994). "A review of "once-a-month" combined injectable contraceptives". J Obstet Gynaecol (Lahore). 4 (Suppl 1): S1–34. doi:10.3109/01443619409027641. PMID12290848.
Koetsawang S (April 1994). "Once-a-month injectable contraceptives: efficacy and reasons for discontinuation". Contraception. 49 (4): 387–98. doi:10.1016/0010-7824(94)90034-5. PMID8013221.
Sang GW (April 1994). "Pharmacodynamic effects of once-a-month combined injectable contraceptives". Contraception. 49 (4): 361–85. doi:10.1016/0010-7824(94)90033-7. PMID8013220.
Hall PE (August 1998). "New once-a-month injectable contraceptives, with particular reference to Cyclofem/Cyclo-Provera". Int J Gynaecol Obstet. 62 (Suppl 1): S43–56. doi:10.1016/S0020-7292(98)00090-3. PMID9806239. S2CID2826689.
Newton JR, D'arcangues C, Hall PE (1994). "A review of "once-a-month" combined injectable contraceptives". J Obstet Gynaecol (Lahore). 4 (Suppl 1): S1–34. doi:10.3109/01443619409027641. PMID12290848.
d'Arcangues C (1993). "Once-a-month injectable contraceptives". World Health Forum. 14 (4): 439–40. PMID8185807.
Koetsawang S (April 1994). "Once-a-month injectable contraceptives: efficacy and reasons for discontinuation". Contraception. 49 (4): 387–98. doi:10.1016/0010-7824(94)90034-5. PMID8013221.
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Hall PE (August 1998). "New once-a-month injectable contraceptives, with particular reference to Cyclofem/Cyclo-Provera". Int J Gynaecol Obstet. 62 (Suppl 1): S43–56. doi:10.1016/S0020-7292(98)00090-3. PMID9806239. S2CID2826689.