**Articles:**

- P S Aleksandrov, V G Boltyanskii, R V Gamkrelidze and E F Mishchenko, Lev Semenovich Pontryagin (on his sixtieth birthday) (Russian),
*Uspekhi Mat. Nauk***23**(6) (1968), 187-196. - P S Aleksandrov, V G Boltyanskii, R V Gamkrelidze and E F Mishchenko, Lev Semenovich Pontryagin (on his sixtieth birthday),
*Russian Math. Surveys***23**(6) (1968), 143-152. - E J McShane, The Calculus of Variations from the beginning through Optimal Control Theory,
*SIAM Journal on Control and Optimization***27**(5) (1989), 916-939. - Pontryagin,
*Notices of the American Mathematical Society***35**(1988), 1002.

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http://www-history.mcs.st-andrews.ac.uk/References/Pontryagin.html