TY - JOUR AU - V. V. Karachik TI - The biharmonic Neumann problem with double involution JO - Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika PY - 2024 SP - 18 EP - 26 VL - 16 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VYURM_2024_16_3_a2/ LA - ru ID - VYURM_2024_16_3_a2 ER -