@article{MZM_1987_42_1_a8,
     author = {S. A. Nazarov},
     title = {Singularities of the gradient of the solution of the {Neumann} problem at the vertex of a cone},
     journal = {Matemati\v{c}eskie zametki},
     pages = {79--93},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_1_a8/}
}