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Chinese Annals of Mathematics, Series B > 2020 > 41 > 1 > 37-48
Computational Methods and Function Theory > 2018 > 18 > 2 > 307-314
Afrika Matematika > 2018 > 29 > 1-2 > 203-209
Frontiers of Mathematics in China > 2016 > 11 > 6 > 1471-1500
Annales UMCS, Mathematica > 2014 > 68 > 2
Frontiers of Mathematics in China > 2015 > 10 > 6 > 1461-1472
Acta Mathematica Scientia > 2014 > 34 > 5 > 1571-1583
Journal of the Egyptian Mathematical Society > 2014 > 22 > 2 > 190-196
Annales UMCS, Mathematica > 2014 > 68 > 1 > 1-10
Journal of Inequalities and Applications > 2014 > 2014 > 1 > 1-16
Chinese Annals of Mathematics, Series B > 2013 > 34 > 4 > 515-528
Boundary Value Problems > 2013 > 2013 > 1 > 1-13
Journal of Inequalities and Applications > 2013 > 2013 > 1 > 1-9
Demonstratio Mathematica > 2012 > Vol. 45, nr 4 > 835-846