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Conversatoria Litteraria > 2016 > 10 > - > 447-476
Journal of Mathematical Analysis and Applications > 2016 > 443 > 1 > 453-477
Russian Mathematics > 2011 > 55 > 1 > 1-6
Integral Equations and Operator Theory > 2009 > 64 > 2 > 203-237
Integral Equations and Operator Theory > 2008 > 62 > 1 > 85-128