%0 Journal Article %A V. I. Tarakanov %T Values of constants in inequalities giving a~priori estimates in $L_2$ of the solution of the Neumann boundary value problem for the Laplace equation %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1986 %P 68-73 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1986_5_a10/ %G ru %F IVM_1986_5_a10