@article{DAN_1966_169_1_a11,
     author = {V. A. Yavryan},
     title = {Regularized trace of the difference of two singular {Sturm{\textendash}Liouville} operators},
     journal = {Doklady Akademii Nauk},
     pages = {49--51},
     year = {1966},
     volume = {169},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_169_1_a11/}
}