@article{IIMI_2006_37_3_a13,
     author = {A. V. Dmitruk},
     title = {Pontryagin maximum principle: half a century later},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {31--32},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2006_37_3_a13/}
}