Zulfiqar, M. (2012) “<b>Some properties of (α, β)-fuzzy positive implicative ideals in BCK-algebras</b> - doi: 10.4025/actascitechnol.v35i2.15898”, Acta Scientiarum. Technology, 35(2), p. 371–377. doi: 10.4025/actascitechnol.v35i2.15898.