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Numerical Analysis and Applications > 2019 > 12 > 3 > 234-250
Bulletin of Mathematical Sciences > 2017 > 7 > 3 > 575-613
Applied Mathematics and Computation > 2011 > 218 > 7 > 3965-3972
Journal of Mathematical Analysis and Applications > 2008 > 339 > 1 > 582-589
Applied Mathematics and Computation > 2005 > 170 > 2 > 1261-1270