@article{VSGTU_2021_25_4_a2,
     author = {S. I. Mitrokhin},
     title = {On the asymptotics of  spectrum of an even-order differential operator with a delta-function potential},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {634--662},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2021_25_4_a2/}
}