%0 Journal Article %A R. Haller-Dintelmann %A W. Höppner %A H.-Ch. Kaiser %A J. Rehberg %A G. M. Ziegler %T Optimal Elliptic Sobolev Regularity Near Three-Dimensional Multi-Material Neumann Vertices %J Funkcionalʹnyj analiz i ego priloženiâ %D 2014 %P 63-83 %V 48 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2014_48_3_a5/ %G ru %F FAA_2014_48_3_a5