1 |
A. H. Clifford and G. B. Preston, The Algebraic Theory of Semigroups, Math. Surveys No. 7, Am. Math. Soc. Province, RI. 1, 1961.
|
2 |
J. M. Howie, An introduction to semigroup theory, Academic Press, 1976.
|
3 |
J. L. Wang, Fuzzy invariant subgroups and fuzzy ideals, Fuzzy Set and Systems 8 (1982), 133-139.
DOI
ScienceOn
|
4 |
J. P. Kim and D. R. Bae, Fuzzy congruences in groups, Fuzzy Set and Systems 85 (1997), 115-120.
DOI
ScienceOn
|
5 |
G. J. Klir and T. A. Folger, Fuzzy Sets, Uncertainties, and Information, F Prentice Hall, Englewood Cliffs. NJ, 1988.
|
6 |
T. Kuraoka and N. Kuroki, On fuzzy quotient rings induced by fuzzy ideals, Fuzzy Set and Systems 47 (1992), 381-386.
DOI
ScienceOn
|
7 |
N. Kuroki, On fuzzy ideals and fuzzy bi-ideals in semigroups, Fuzzy Set and Systems 5 (1981), 203-251.
DOI
ScienceOn
|
8 |
N. Kuroki, Fuzzy semiprime ideals in semigroups, Fuzzy Set and Systems 8 (1982), 71-79.
DOI
ScienceOn
|
9 |
V. Murali, Fuzzy equivalence relations, Fuzzy Set and Systems 30 (1989), 155-163.
DOI
ScienceOn
|
10 |
M. Petrich, Introduction to semigroups, Charles E. Merrill. Columbus. OH. 5, 1973.
|
11 |
A. Rosenfeld, Fuzzy groups, J. Math. Anal. Appl. 35 (1971), 512-517.
DOI
|
12 |
X. Xie, Fuzzy Rees congruences on Semigroups, Fuzzy Set and Systems 102 (1992), 353-359.
|
13 |
L. A. Zadeh, Fuzzy sets, Inform. Control 8 (1965), 338-353.
DOI
|