@article{FAA_1997_31_4_a8,
     author = {B. P. Osilenker},
     title = {An {Analog} of the {Trace} {Formula} for {Discrete} {Sturm{\textendash}Liouville} {Operators} with {Asymptotically} $N${-Periodic} {Coefficients}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {72--75},
     year = {1997},
     volume = {31},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1997_31_4_a8/}
}