1. R. S. Kuznetskii, Inzh.-Fiz. Zh.,20, No. 1 (1971).
2. G. A. Petrov, Liquid Movement with Variation of Flow-Rate along a Trajectory [in Russian], Gosstroiizdat, Moscow-Leningrad (1951).
3. N. E. Kochin, I. A. Kibel', and N. V. Roze, Theoretical Hydromechanics [in Russian], Fizmatgiz, Moscow (1965).