@article{UFA_2020_12_1_a4,
     author = {A. V. Chernov},
     title = {On preservation of global solvability of controlled second kind operator equation},
     journal = {Ufa mathematical journal},
     pages = {56--81},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2020_12_1_a4/}
}