@article{702189,
title = {On an optimal control problem},
booktitle = {Differential Equations and Their Applications},
series = {GDML\_Books},
publisher = {Publishing House of the Czechoslovak Academy of Sciences},
address = {Prague},
year = {1963},
pages = {229-242},
mrnumber = {MR0201758},
zbl = {0133.06005},
url = {http://dml.mathdoc.fr/item/702189}
}
Ważewski, T. On an optimal control problem, dans Differential Equations and Their Applications, GDML_Books, (1963), pp. 229-242. http://gdmltest.u-ga.fr/item/702189/