@article{DAN_1960_132_1_a1,
     author = {V. S. Buslaev and L. D. Faddeev},
     title = {Formulas for traces for a singular {Sturm--Liouville} differential operator},
     journal = {Doklady Akademii Nauk},
     pages = {13--16},
     publisher = {mathdoc},
     volume = {132},
     number = {1},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_1_a1/}
}