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2013
Isometries between minimal helicoidal surfaces and rotation surfaces in minkowski space.
[DOI]
Fenghui Ji
,
Young Ho Kim
Appl. Math. Comput., 2013
2011
Efficiency Analysis of the Government Supervising Firms Pollution Control.
[DOI]
Yan Wang
,
Fenghui Ji
Proceedings of the Advances in Computer Science, 2011