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7 K. Is´eki, "On BCI-algebras" 8 (8): 125-130, 1980
8 Q. P. Hu, "On BCH-algebras" 11 : 311-320, 1983
9 C. B. Kim, "ON BG-algebras" XLI (XLI): 497-505, 2008
10 M. Azhagappan, "Notes on bipolar valued fuzzy RW-closaed and bipolar valued fuzzy RW-open sets in bipolar valued fuzzy topological spaces" 7 (7): 30-36, 2016
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