By Qian F.   Wang X.   Wang X.   Bu Y.   in Optik – International Journal for Light and Electron Optics

ISSN:0030-4026|112|10|465-468

Urban & Fischer‎(2001)‎

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By Jia F.   Xue Q.   Zheng Q.   Bu Y.   Qian L.   in Applied Physics B

ISSN:0946-2171|87|2|387-387

Springer Publishing Company ‎(2007)‎

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By Bu Y.L.   Su H.S.   in Fuzzy Sets and Systems

ISSN:0165-0114|101|3|505-508

Elsevier‎(1999)‎

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By Jin H.P.   Bu Y.L.   in Fuzzy Sets and Systems

ISSN:0165-0114|98|2|201-206

Elsevier‎(1998)‎

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