@article{BGUMI_2017_1_a0,
     author = {M. G. Kot},
     title = {Asymptotics of the eigenvalues of approximating differential equations with $\delta$-different coefficients},
     journal = {Journal of the Belarusian State University. Mathematics and Informatics},
     pages = {4--10},
     publisher = {mathdoc},
     volume = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/BGUMI_2017_1_a0/}
}