@article{TIMM_2004_10_2_a8,
     author = {N. N. Subbotina},
     title = {Adjoint variables to optimal control problems},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {131--141},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2004_10_2_a8/}
}