TY - JOUR AU - V. A. Strauss TI - Models of self-adjoint and unitary operators in Pontryagin spaces JO - Contemporary Mathematics. Fundamental Directions PY - 2022 SP - 522 EP - 552 VL - 68 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMFD_2022_68_3_a7/ LA - ru ID - CMFD_2022_68_3_a7 ER -