@article{RM_1989_44_3_a4,
     author = {K. Kh. Boimatov and A. Sharifov},
     title = {Coercive estimates and separability for differential operators of arbitrary order},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {181--182},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_3_a4/}
}