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Russian Mathematics > 2013 > 57 > 8 > 1-9
Russian Mathematics > 2011 > 55 > 10 > 9-12
Acta Applicandae Mathematicae > 2005 > 85 > 1-3 > 11-15
Siberian Mathematical Journal > 2004 > 45 > 6 > 1053-1062
Algebra and Logic > 2003 > 42 > 1 > 29-36