TY - JOUR AU - V. A. Erovenko TI - On $L^p$-essential spectra of some classes of nonselfadjoint ordinary differential operators. I.~Operators with sufficiently smooth coefficients JO - Differencialʹnye uravneniâ PY - 1996 SP - 1024 EP - 1034 VL - 32 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1996_32_8_a2/ LA - ru ID - DE_1996_32_8_a2 ER -