@article{IM2_1975_9_3_a7,
     author = {V. Ya. Golodets},
     title = {Spectral properties of modular operators and the asymptotic ratio set},
     journal = {Izvestiya. Mathematics },
     pages = {599--619},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_3_a7/}
}