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pontragin L S, Boltyanskii V G & Gamkrelidze R V. (1962). mathematical theory of optimal process. : .
pontragin L S, Boltyanskii V G and Gamkrelidze R V. 1962. mathematical theory of optimal process. : .
pontragin L S, Boltyanskii V G and Gamkrelidze R V. (1962). mathematical theory of optimal process. : .
pontragin L S, Boltyanskii V G and Gamkrelidze R V. mathematical theory of optimal process. : . 1962.
