Open Science Research Excellence
D.R Prince Williams,  Fuzzy Ideals in Near-subtraction Semigroups.   journal   = {International Journal of Mathematical, Computational, Physical, Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2008, vol. 19(7). 458 - 465[viewed 25 April 2019]. Available from: http://waset.org/publications/14409.