1. A. D. Tyuptsov, ?Hydrostatics in weak force fields. Stability of equilibrium liquid surface forms,? Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 2 (1966).
2. M. A. Belyaeva, L. A. Slobozhanin, and A. D. Tyuptsov, ?Hydrostatics in weak force fields,? in: Introduction to Dynamics of a Body with Liquid Under Conditions of Weightlessness [in Russian], AN SSSR, Moscow (1968).
3. R. Courant and D. Hilbert, Methods of Mathematical Physics, Vol. 1, Wiley (1961).
4. M. A. Lavrent'ev and L. A. Lyusternik, Fundamentals of Variational Computation [in Russian], Vol. 1, Pt. 2, ONTI, Moscow (1935).
5. L. A. Slobozhanin and A. D. Typutsov, ?Determination of the equilibrium state of a capillary liquid in a vessel,? Izv. Akad. Nauk SSSR, Mekhan. Zhidk. Gaza, No. 4 (1973).