TY - JOUR AU - S. A. Nazarov TI - Waveguide with double threshold~resonance at a~simple threshold JO - Sbornik. Mathematics PY - 2020 SP - 1080 EP - 1126 VL - 211 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_2020_211_8_a1/ LA - en ID - SM_2020_211_8_a1 ER -