@article{JFAA_2001__7_4_59696,
     author = {A. B\"ottcher and S. Grudsky},
     title = {Toeplitz {Operators} with {Frequency} {Modulated} {Semi-Almost} {Periodic} {Symbols.}},
     journal = {The journal of Fourier analysis and applications},
     pages = {523--536},
     year = {2001},
     volume = {7},
     number = {4},
     zbl = {0996.47035},
     url = {http://geodesic.mathdoc.fr/item/JFAA_2001__7_4_59696/}
}