@article{RM_1960_15_1_a1,
     author = {I. I. Pyatetskii-Shapiro},
     title = {The theory of modular functions and related questions in the theory of discrete groups},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {97--128},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1960},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1960_15_1_a1/}
}