@article{SM_2007_198_5_a6,
     author = {V. V. Ryzhikov},
     title = {Weak limits of powers, simple spectrum of},
     journal = {Sbornik. Mathematics},
     pages = {733--754},
     year = {2007},
     volume = {198},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2007_198_5_a6/}
}