W. Bi, J. Dunn1, S. McCorkle1, R. Gabriel, & W. Lewis, "Identify the Gene Positions of Methylated DNA with a Database Approach", in Proceedings of 2007 IEEE Systems, Man and Cybernetics International Conference, Montreal, Canada, 2007.
W. Bi, & J. Sun "Equivalence of Transforming Non-linear DACG to linear Concept Tree", in Proceedings of 4th Annual International Conference on Computer and Information Science (ICIS) in South Korea, 2005.
W. Bi, Dissertation "Knowledge Discovery by Attribute-Oriented Approach under Directed Acyclic Concept Graph (DACG)", UMI Company, USA, 2002.
J. Sun, & W. Bi "Directed Acyclic Concept Graph Based Attribute Oriented Induction", in Proceedings of the 2001 IEEE Systems, Man and Cybernetics International Conference, 2001.