@article{MZM_1981_30_3_a1,
     author = {Yu. A. Alkhutov},
     title = {Regularity of boundary points relative to the {Dirichlet} problem for second-order elliptic equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {333--342},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1981_30_3_a1/}
}