Sufficient control optimality condition for linear periodic systems, not solved with respect to the derivative
English version (Springer): Ukrainian Mathematical Journal 39 (1987), no. 6, pp 639-641.
Citation Example: Kurina G. A. Sufficient control optimality condition for linear periodic systems, not solved with respect to the derivative // Ukr. Mat. Zh. - 1987. - 39, № 6. - pp. 783–786.
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