@article{FAA_2014_48_3_a5,
     author = {R. Haller-Dintelmann and W. H\"oppner and H.-Ch. Kaiser and J. Rehberg and G. M. Ziegler},
     title = {Optimal {Elliptic} {Sobolev} {Regularity} {Near} {Three-Dimensional} {Multi-Material} {Neumann} {Vertices}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {63--83},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2014_48_3_a5/}
}