V. G. Boltyanski, R. V. Gamkrelidze, E. F. Mishchenko, L. S. Pontryagin, The maximum principle in the theory of optimal processes of control (with discussion)

Title: The maximum principle in the theory of optimal processes of control (with discussion)
Authors: V. G. Boltyanski, R. V. Gamkrelidze, E. F. Mishchenko, L. S. Pontryagin
Journal title: Automatic and Remote Control
Year: 1960
Volume: 1
Pages: 454–459