YusufA. O., NworahC., and IsyakuM. “ON THE STUDY OF CHAINS SOFT SETS, SOFT ORDERED SETS AND SOFT SEMILATTICES”. FUDMA JOURNAL OF SCIENCES, Vol. 5, no. 4, Jan. 2022, pp. 44 -8, doi:10.33003/fjs-2021-0504-779.