TY - JOUR AU - Sergey V. Sudoplatov TI - Variations of rigidity JO - The Bulletin of Irkutsk State University. Series Mathematics PY - 2024 SP - 119 EP - 136 VL - 47 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIGUM_2024_47_a8/ LA - en ID - IIGUM_2024_47_a8 ER -