@article{DAN_1994_339_1_a0,
     author = {K. Kh. Boimatov},
     title = {Matrix differential operators generated by noncoercive bilinear},
     journal = {Doklady Akademii Nauk},
     pages = {5--10},
     publisher = {mathdoc},
     volume = {339},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_339_1_a0/}
}