TY - JOUR AU - K. N. Zhuikov AU - A. Yu. Savin TI - On two methods of determining $\eta$-invariants of elliptic boundary-value problems JO - Contemporary Mathematics. Fundamental Directions PY - 2024 SP - 403 EP - 416 VL - 70 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2024_70_3_a4/ LA - ru ID - CMFD_2024_70_3_a4 ER -