@article{EMJ_2017_8_3_a8,
     author = {A. Sh. Shukurov},
     title = {On the number of non-real eigenvalues of the {Sturm--Liouville} problem},
     journal = {Eurasian mathematical journal},
     pages = {77--84},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2017_8_3_a8/}
}