1. G. A. Petrov, Motion of a Fluid with a Variable Flow Rate along the Path [in Russian], Gosstroiizdat, Moscow-Leningrad (1951).
2. G. A. Petrov, Hydraulics of Variable Mass [in Russian], Izd-vo KhGU, Kharkov (1964).
3. H. Favre, Contribution à l'étude des courants liquids, Zürich (1933).
4. R. S. Kuznetskii, in: Scientific Proceedings of the ?Giprostal'? Institute [in Russian], No. 9 (1967). p. 80.
5. R. S. Kuznetskii and S. U. Medyanaya, in: Scientific Proceedings of the VNIPI Institute [in Russian], No. 10 (1968), p. 128.