1. M. Roosli, P. Frei, et al., Bull. W. H. O., 88(12), 877 – 953 (2010).
2. M. V. Maiorov, Med. Farm., 2(5), 8 – 14 (1999).
3. M. V. Maiorov, Modern Methods of Contraception. Line of Health [in Russian], Farmitek, Kharkov (2005), pp. 20 – 31.
4. P. V. Sergeev, T. A. Fedotcheva, V. M. Rzheznikov, et al., Vestn. Ross. Akad. Med. Nauk, 5, 27 – 32 (2007).
5. A. V. Semeikin, T. A. Fedotcheva, I. S. Levina, et al., Khim.-farm. Zh., 48, 9 – 13 (2014).