@article{DAN_1990_314_1_a36,
     author = {G. L. Kharatishvili and T. A. Tadumadze},
     title = {Regular perturbations in optimal control problems with variable},
     journal = {Doklady Akademii Nauk},
     pages = {151--155},
     publisher = {mathdoc},
     volume = {314},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a36/}
}