@article{VUU_2021_31_2_a1,
     author = {N. S. Imanbaev},
     title = {On nonlocal perturbation of the problem on eigenvalues of differentiation operator on a segment},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {186--193},
     year = {2021},
     volume = {31},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VUU_2021_31_2_a1/}
}