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Journal of Mathematical Analysis and Applications > 2012 > 394 > 2 > 481-487
Topology and its Applications > 2011 > 158 > 5 > 653-659
Topology and its Applications > 2001 > 109 > 2 > 237-256
Journal of Mathematical Analysis and Applications > 2012 > 394 > 2 > 481-487
Topology and its Applications > 2011 > 158 > 5 > 653-659
Topology and its Applications > 2001 > 109 > 2 > 237-256