@article{TIMM_2013_19_4_a24,
     author = {P. G. Surkov},
     title = {On an optimal control problem for a nonlinear system},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {241--249},
     year = {2013},
     volume = {19},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2013_19_4_a24/}
}