1. L. A. Vulis and V. P. Kashkarov, Theory of a Viscous Fluid Jet [in Russian], Nauka, Moscow (1965).
2. B. P. Beloglazov, Dokl. Akad. Nauk SSSR,198, No. 3 (1971).
3. A. Angeaux, Mathematics for Electrical and Radio Engineers [Russian translation], Nauka, Moscow (1964).
4. B. P. Beloglazov and A. S. Ginevskii, Uch. Zap. Tsentr. Aéro-gidrodinam. Inst.,5, No. 4 (1974).