@article{DAN_1984_275_2_a3,
     author = {V. A. Bulavskii and M. A. Yakovleva},
     title = {Generalized tridiagonal matrices and {Sturm's} theorem},
     journal = {Doklady Akademii Nauk},
     pages = {277--280},
     publisher = {mathdoc},
     volume = {275},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_2_a3/}
}