@article{AA_1991_3_2_a1,
     author = {E. M. Dyn'kin and S. N. Naboko and S. I. Yakovlev},
     title = {A~finiteness bound for the singular spectrum in a~selfadjoint {Friedrichs} model},
     journal = {Algebra i analiz},
     pages = {77--90},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_2_a1/}
}