Ranjith Vasireddy Somenath Biswas Modeling Gene Regulatory Network in Fission Yeast Cell Cycle Using Hybrid Petri Nets. 1310-1315 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3316&spage=1310 2004 conf/iconip/2004 ICONIP db/conf/iconip/iconip2004.html#VasireddyB04