By Sangwin Christopher   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|38|8|987-1002

Taylor & Francis Ltd‎(2007)‎

Access to resources Favorite 19.0073

By Sangwin Christopher J.   in Mathematics Magazine

ISSN:1930-0980|81|2|116-126

Mathematical Association of America‎(2008)‎

Access to resources Favorite 15.20584