1. L. S. Pontryagin, V. G. Boltyanskii, et al., Mathematical Theory of Optimum Processes [in Russian], Nauka, Moscow (1976).
2. V. I. Blagodatskikh, Optimum Control Problem for Differential Connections, Author's Abstract of Physical-Mathematical Sciences Doctoral Dissertation, MGU, Moscow (1983).
3. G. I. Marchuk, Methods of Computational Mathematics [in Russian], Nauka, Moscow (1980).
4. G. I. Marchuk and V. I. Agoshkov, Introduction to Projection-Grid Methods [in Russian], Nauka, Moscow (1981).
5. V. V. Larchenko, ?Asymptotic analysis of nonaxisymmetric modes of equilibrium of a thin shallow spherical shell,? Prikl. Mat. Mekh.,44, No. 6 (1980).