@article{FAA_1999_33_1_a4,
     author = {M. L. Gorbachuk and A. Ya. Shklyar},
     title = {On the {Smoothness} of {Weak} {Solutions} of {Operator} {Differential} {Equations}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {59--61},
     publisher = {mathdoc},
     volume = {33},
     number = {1},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1999_33_1_a4/}
}