@article{JCEM_2017_4_1_a3,
     author = {S. I. Kadchenko and G. A. Zakirova},
     title = {Calculation of eigenvalues of discrete semibounded differential operators},
     journal = {Journal of computational and engineering mathematics},
     pages = {38--47},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JCEM_2017_4_1_a3/}
}