%0 Journal Article %A N. S. Goncharov %T Eigenvalues and eigenfunctions of the Laplace operator in a square and in a circle with a Wentzel boundary condition %J Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika %D 2022 %P 17-22 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VYURM_2022_14_3_a1/ %G ru %F VYURM_2022_14_3_a1