1. Laskorin, B.N., Skorovarov, D.I., Filippov, E.A., and Kuznetsov, V.A., USSR Inventor’s Certificate no. 181812, 1966, Byull. Izobret., 1966, no. 10, p. 80.
2. Filippov, E.A., Arkhipova, G.G., Belov, V.A., et al., Primenenie fosforazotorganicheskikh kompleksoobrazovatelei v protsessakh zhidkostnoi ekstraktsii urana i transuranovykh elementov (Use of P,N-Containing Organic Complexants in Liquid Extraction of Uranium and Transuranium Elements), Moscow: TsNIIatominform, 1978, part 2.
3. Zelikman, A.N., Vol’dman, G.M., and Bulgakov, V.N., Tsvetn. Met., 1974, N 2.
4. Rozen, A.M., Volk, V.I., Nikolotova, Z.I., and Kartasheva, N.A., Zh. Neorg. Khim., 1982, vol. 27, no. 2, pp. 431–435.
5. Rozen, A.M., Volk, V.I., Nikolotova, Z.I., et al., Radiokhimiya, 1981, vol. 23, no. 6, pp. 805–809.