1. Wang, G.J.: Thoery of L-fuzzy topological spaces. Shanxi Normal University Press (1988)
2. Chen, S.L.: On L-fuzzy Order-preserving Operator ω-spaces. The Journal of Fuzzy Mathematics 14(2), 481–499 (2006)
3. Chen, S.L.: Several order-homomorphisms on L–fuzzy topological spaces. Shanxi Normal University 16(3), 15–19 (1988)
4. Chen, S.L.: ω-base and Its Properties in L-fuzzy Order-preserving Operator Spaces. Journal of Jianghan Petroleum Institute 25(3), 143–145 (2003)
5. Chen, S.L., Wu, Y.D., Cai, G.R.: Omega Theta-Convegence Theory of Filters in L -Spaces. In: Proc. FSKD (IEEE), vol. 7, pp. 683–687 (2008)