@article{RM_1985_40_1_a18,
     author = {K. A. Mirzoev},
     title = {A~criterion for the quasi-regularity of an operator induced by a~quasi-differential expression},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {229--230},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1985_40_1_a18/}
}