Functional dependencies in extended possibility-based fuzzy relational databases. - Zong Min Ma 001; W. J. Zhang; W. Y. Ma; G. Q. Chen (FUZZ-IEEE, 2000)

Extending IDEF1X to model fuzzy data. - Z. M. Ma; Wen-Jun Zhang 005; W. Y. Ma (J. Intell. Manuf., 2002)