V. G. Boltyanskiĭ, R. V. Gamkrelidze, L. S. Pontryagin, On the theory of optimal processes

Title: On the theory of optimal processes
Authors: V. G. Boltyanskiĭ, R. V. Gamkrelidze, L. S. Pontryagin
Journal title: Dokl. Akad. Nauk SSSR (N.S.)
Year: 1956
Volume: 110
Pages: 7–10