TY - JOUR AU - J. Ben Amara AU - A. A. Vladimirov AU - A. A. Shkalikov TI - Spectral and Oscillatory Properties of a Linear Pencil of Fourth-Order Differential Operators JO - Matematičeskie zametki PY - 2013 SP - 55 EP - 67 VL - 94 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2013_94_1_a4/ LA - ru ID - MZM_2013_94_1_a4 ER -