@article{MZM_1983_34_6_a8,
     author = {M. D. Madatov},
     title = {Problems with control in the coefficients of {Elliptic} equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {873--882},
     publisher = {mathdoc},
     volume = {34},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_34_6_a8/}
}