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Aequationes mathematicae > 2015 > 89 > 4 > 1123-1131
Fixed Point Theory and Applications > 2013 > 2013 > 1 > 1-28
Boundary Value Problems > 2013 > 2013 > 1 > 1-15
Aequationes mathematicae > 2015 > 89 > 4 > 1123-1131
Fixed Point Theory and Applications > 2013 > 2013 > 1 > 1-28
Boundary Value Problems > 2013 > 2013 > 1 > 1-15