1. Kon’kova, S.G., Abovyan, G.M., Khachatryan, A.Kh., Badasyan, A.E., Panosyan, G.A., and Sarkisyan, M.S., Khim. Zh. Armenii, 2003, vol. 56, no.4, p. 118.
2. Sore, A.S. and Napsosk, E.M., J. Am. Chem. Soc., 1942, vol. 64, p. 1503.
3. Kon’kova, S.G., Badasyan, A.E., Khachatryan, A.Kh., and Sarkisyan, M.S., Khim. Zh. Armenii, 1999, vol. 52, no.4, p. 19.
4. Walker, G.N. and Moore, M.A., J. Org. Chem., 1961, vol. 26, p. 432.
5. Kon’kova, S.G., Badasyan, A.E., Attaryan, O.S., Khachatryan, A.Kh., Sargsyan, M.S., and Dovlatyan, V.V., Khim. Zh. Armenii, 1997, vol. 50, nos.3–4, p. 161.