β-open and β-continuous mappings in fuzzy bitopological spaces S. S. Thakur; Annamma Philip — 1995 Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
Pairwise fuzzy connectedness between fuzzy sets Samajh, Singh Thakur; Annamma Philip — 1997 Mathematica Bohemica In this paper the concept of fuzzy connectedness between fuzzy sets is generalized to fuzzy bitopological spaces and some of its properties are studied.