John N. Mordeson, Davender S. Malik, Nobuaki Kuroki. Fuzzy Semigroups. Volume 131 of Studies in Fuzziness and Soft Computing, Springer, 2003. [doi]
@book{sfsc-MordesonMK03, title = {Fuzzy Semigroups}, author = {John N. Mordeson and Davender S. Malik and Nobuaki Kuroki}, year = {2003}, doi = {10.1007/978-3-540-37125-0}, url = {http://dx.doi.org/10.1007/978-3-540-37125-0}, researchr = {https://researchr.org/publication/sfsc-MordesonMK03}, cites = {0}, citedby = {0}, volume = {131}, series = {Studies in Fuzziness and Soft Computing}, publisher = {Springer}, isbn = {978-3-642-05706-9}, }