By Pathak H.K.   Grewal A.S.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|33|1|150-156

Taylor & Francis Ltd‎(2002)‎

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By Pathak H.K.   Grewal A.S.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|33|4|575-583

Taylor & Francis Ltd‎(2002)‎

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By Cho Y.J.   Pathak H.K.   Kang S.M.   Jung J.S.   in Fuzzy Sets and Systems

ISSN:0165-0114|93|1|99-111

Elsevier‎(1998)‎

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