Geodesic
Certain problems of the theory of difference boundary value problems
Matematičeskie zametki, Tome 7 (1970) no. 5, pp. 655-663 
V. S. Ryaben'kii. Certain problems of the theory of difference boundary value problems. Matematičeskie zametki, Tome 7 (1970) no. 5, pp. 655-663. http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a13/
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     author = {V. S. Ryaben'kii},
     title = {Certain problems of the theory of difference boundary value problems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {655--663},
     year = {1970},
     volume = {7},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a13/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

This is an author's abstract of a dissertation for the degree of doctor of physicomathematical sciences. The dissertation was defended on December 2, 1969, at a session of the Scientific Council of the Institute of Applied Mathematics, Academy of Sciences of the USSR. The official opponents were: Doctor of Physicomathematical Sciences Prof. K. I. Babenko, Doctor of Physicomathematical Sciences Prof. N. S. Bakhvalov, and Doctor of Physicomathematical Sciences E. A. Volkov.