@article{MZM_2014_96_1_a9,
     author = {S. N. Oshchepkova and O. M. Penkin and D. Savasteev},
     title = {The {Normal} {Derivative} {Lemma} for the {Laplacian} on a {Polyhedral} {Set}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {116--125},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2014_96_1_a9/}
}