@article{DE_1980_16_11_a14,
     author = {N. A. Sidorov and V. A. Trenogin},
     title = {Regularization of linear controls on the basis of perturbation theory},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2039--2049},
     publisher = {mathdoc},
     volume = {16},
     number = {11},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_11_a14/}
}