@article{IVM_1981_11_a2,
     author = {I. S. Kats},
     title = {Theorems of the connection between the behavior of $R$-functions and the behavior of their spectral functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {15--20},
     publisher = {mathdoc},
     number = {11},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1981_11_a2/}
}