@article{SM_2020_211_8_a1,
     author = {S. A. Nazarov},
     title = {Waveguide with double threshold~resonance at a~simple threshold},
     journal = {Sbornik. Mathematics},
     pages = {1080--1126},
     publisher = {mathdoc},
     volume = {211},
     number = {8},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_8_a1/}
}