@article{SM_1977_31_3_a4,
     author = {F. S. Rofe-Beketov and A. M. Khol'kin},
     title = {On the connection between spectral and oscillation properties of the {Sturm{\textendash}Liouville} matrix problem},
     journal = {Sbornik. Mathematics},
     pages = {365--378},
     year = {1977},
     volume = {31},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1977_31_3_a4/}
}