@article{SM_2023_214_5_a2,
     author = {A. M. Gaisin and R. A. Gaisin},
     title = {Levinson-type theorem and {Dyn'kin} problems},
     journal = {Sbornik. Mathematics},
     pages = {676--702},
     year = {2023},
     volume = {214},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2023_214_5_a2/}
}