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Science China Mathematics > 2011 > 54 > 9 > 2005-2012
Integral Equations and Operator Theory > 2011 > 71 > 1 > 113-128
Journal of Mathematical Analysis and Applications > 2010 > 369 > 1 > 368-376
Integral Equations and Operator Theory > 2010 > 67 > 2 > 163-170
Journal of Functional Analysis > 2008 > 255 > 6 > 1419-1457