@article{ZNSL_1988_173_a16,
     author = {S. K. Tleukenov},
     title = {Disposition of the dispersion equation roots for a wave guide being periodical and inhomogeneous with the depth},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {167--171},
     year = {1988},
     volume = {173},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1988_173_a16/}
}