@article{ZVMMF_2007_47_3_a1,
     author = {A. V. Arutyunov and D. Yu. Karamzin},
     title = {Necessary optimality conditions for abnormal problems with geometric constraints},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {364--375},
     publisher = {mathdoc},
     volume = {47},
     number = {3},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2007_47_3_a1/}
}