@article{SM_2014_205_12_a4,
     author = {G. R. Yodgorov and F. Ismail and Z. I. Muminov},
     title = {A~description of the location and structure of the essential spectrum of a~model operator in a~subspace of {a~Fock} space},
     journal = {Sbornik. Mathematics},
     pages = {1761--1774},
     publisher = {mathdoc},
     volume = {205},
     number = {12},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2014_205_12_a4/}
}