@article{ZNSL_2015_433_a5,
     author = {V. V. Borzov and E. V. Damaskinsky},
     title = {The discrete spectrum of {Jacobi} matrix related to recurrence relations with periodic coefficients},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {111--130},
     year = {2015},
     volume = {433},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2015_433_a5/}
}