TY - JOUR AU - N. P. Kosar AU - O. Akcay TI - The spectrum and principal functions of a nonself-adjoint Sturm--Liouville operator with discontinuity conditions JO - Eurasian mathematical journal PY - 2024 SP - 55 EP - 67 VL - 15 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EMJ_2024_15_3_a5/ LA - en ID - EMJ_2024_15_3_a5 ER -