By Hajja M.   Walker P.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|33|5|725-729

Taylor & Francis Ltd‎(2002)‎

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By Hajja M.   Walker P.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|32|4|501-508

Taylor & Francis Ltd‎(2001)‎

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By Abu-Saris R.   Hajja M.   in Journal of Mathematical Analysis and Applications

ISSN:0022-247X|288|1|299-313

Elsevier‎(2003)‎

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By Abu-Saymeh S.   Hajja M.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|36|8|889-912

Taylor & Francis Ltd‎(2005)‎

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