By Easdown David   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|40|7|941-949

Taylor & Francis Ltd‎(2009)‎

Access to resources Favorite 18.3641

By Easdown David   Jordan Patrick   Roberts Brad   in Semigroup Forum

ISSN:0037-1912|81|1|85-101

Springer Publishing Company ‎(2010)‎

Access to resources Favorite 11.018459