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Journal of Mathematical Analysis and Applications > 2013 > 408 > 2 > 789-794
Journal of Mathematical Analysis and Applications > 2013 > 397 > 2 > 822-836
Mathematische Nachrichten > 283 > 1 > 21 - 39
Journal of Algebra > 2009 > 322 > 2 > 327-352
Journal of Algebra > 2009 > 321 > 9 > 2545-2566
Archiv der Mathematik > 2009 > 92 > 5 > 405-413
Journal of Functional Analysis > 2006 > 237 > 2 > 721-737