On optimal control of systems described by general elliptic boundary problems
English version (Springer): Ukrainian Mathematical Journal 28 (1976), no. 4, pp 433-436.
Citation Example: Roitberg Ya. A., Sheftel' Z. G. On optimal control of systems described by general elliptic boundary problems // Ukr. Mat. Zh. - 1976. - 28, № 4. - pp. 556–561.
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