%0 Journal Article %A V. I. Voytitsky %A A. S. Prudkii %T Refined spectral properties of Dirichlet and Neumann problems for the Laplace operator in a rectangular domain %J Vladikavkazskij matematičeskij žurnal %D 2023 %P 20-32 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMJ_2023_25_1_a1/ %G ru %F VMJ_2023_25_1_a1