On the lattice of fuzzy ideals of a ring. - Qingde Zhang; Guangwu Meng (Fuzzy Sets Syst., 2000)

On stratiform L-fuzzy topologies and their application. - Xingfang Zhang; Guangwu Meng; Yalin Zheng; Qingde Zhang (Fuzzy Sets Syst., 2001)

The lattice of fuzzy (left, right) ideals of a ring is modular. - Qingde Zhang (Fuzzy Sets Syst., 2002)