@article{DAN_1978_239_2_a5,
     author = {I. V. Skrypnik},
     title = {On the coercivity inequality for pairs of linear elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {275--278},
     publisher = {mathdoc},
     volume = {239},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_2_a5/}
}