Ideals on de Morgan topological algebra. - Xueyou Chen (Fuzzy Sets Syst., 2001)

Formal Topology, Chu Space and Approximable Concept. - Xueyou Chen; Qingguo Li (CLA, 2005)

Generalizations of Approximable Concept Lattice. - Xueyou Chen; Qingguo Li; Fei Long; Zike Deng (CLA, 2006)

Chu Space and Approximable Concept Lattice in Fuzzy Setting. - Xueyou Chen; Qingguo Li; Zike Deng (FUZZ-IEEE, 2007)

Construction of rough approximations in fuzzy setting. - Xueyou Chen; Qingguo Li (Fuzzy Sets Syst., 2007)

Concept Lattices in L-Rough Sets. - Xueyou Chen (ISNN (2), 2009)

Continuous lattices of L-sets. - Xueyou Chen (IWACI, 2010)

Contact Relation and Way-Below Relation in Fuzzy Setting. - Xueyou Chen (ICICA (2), 2012)

Rough Soft Sets in Fuzzy Setting. - Xueyou Chen (ICSI (1), 2013)

The Lattice Structure of L-Contact Relations. - Xueyou Chen (Adv. Fuzzy Syst., 2016)

Topological Structures via Interval-Valued Neutrosophic Crisp Sets. - Dongsik Jo; S. Saleh; Jeong-Gon Lee; Kul Hur; Xueyou Chen (Symmetry, 2020)