Inho Park Dokyun Na Doheon Lee Kwang Hyung Lee Fuzzy Continuous Petri Net-Based Approach for Modeling Immune Systems. 278-285 2005 conf/wirn/2005 WIRN/NAIS http://dx.doi.org/10.1007/11731177_35 db/conf/wirn/wirn2005.html#ParkNLL05