@article{EMJ_2020_11_2_a3,
     author = {A. G. Baskakov and I. A. Krishtal and N. B. Uskova},
     title = {On the spectral analysis of a differential operator with an involution and general boundary conditions},
     journal = {Eurasian mathematical journal},
     pages = {30--39},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2020_11_2_a3/}
}