@article{MZM_2011_90_2_a0,
     author = {A. A. Azamov},
     title = {On {Pontryagin's} {First} {Direct} {Method} in {Pursuit} {Problems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {163--167},
     publisher = {mathdoc},
     volume = {90},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_2_a0/}
}