P. S. Aleksandrov, V. G. Boltyanskii, R. V. Gamkrelidze, E. F. Mishchenko, Lev Semenovich Pontryagin (on the occasion of his sixtieth birthday)

Title: Lev Semenovich Pontryagin (on the occasion of his sixtieth birthday)
Authors: P. S. Aleksandrov, V. G. Boltyanskii, R. V. Gamkrelidze, E. F. Mishchenko
Journal title: Russian Math. Surveys
Year: 1968
Issue: 6
Volume: 23
Pages: 143-152
Citation:

P. S. Aleksandrov, V. G. Boltyanskii, R. V. Gamkrelidze, E. F. Mishchenko, “Lev Semenovich Pontryagin (on the occasion of his sixtieth birthday)”, Russian Mathematical Surveys, 1968, 23:6, 143–152