@article{SM_1975_26_2_a8,
     author = {I. I. Pyatetskii-Shapiro and M. E. Novodvorskii},
     title = {Letter to the {Editor}},
     journal = {Sbornik. Mathematics},
     pages = {294},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_26_2_a8/}
}