By Tien H. L.   Hansuebsai D.   Phien H. N.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|30|2|243-257

Taylor & Francis Ltd‎(1999)‎

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By Dejdumrong N.   Phien H.N.   le Tien H.   Lay K.M.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|32|4|565-584

Taylor & Francis Ltd‎(2001)‎

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By Hieu L.C.   Bohez E   Vander Sloten J   Phien H.N.   Vatcharaporn E   Binh P.H.   An P.V.   Oris P   in Rapid Prototyping Journal

ISSN:1355-2546|9|3|175-186

Emerald Group Publishing Ltd‎(2003)‎

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