@article{IVM_2016_3_a4,
     author = {N. A. Yessirkegenov and M. A. Sadybekov},
     title = {Spectral properties of boundary-value problem with a~shift for wave equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {48--54},
     publisher = {mathdoc},
     number = {3},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2016_3_a4/}
}