TY - JOUR AU - Nurlan S. Imanbaev TI - Characteristic determinant of a perturbed regular third-order differential operator on an interval JO - Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika PY - 2025 SP - 25 EP - 31 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JSFU_2025_18_1_a2/ LA - en ID - JSFU_2025_18_1_a2 ER -