Operations on fuzzy ideals of $\Gamma$-semirings
  The purpose of this paper is to introduce different types of operations on fuzzy ideals of $\Gamma$-semirings and to prove subsequently that these oprations give rise to different structures such as complete lattice, modular lattice on some restricted class of fuzzy ideals of $\Gamma$-semirings. A characterization of a regular $\Gamma$-semiring has also been obtained in terms of fuzzy subsets. 
T. K. Dutta, Sujit Kumar Sardar and Sarbani Goswami
math.GM