Fu-Shiung Hsieh Chih Yi Chiang Workflow Planning in Holonic Manufacturing Systems with Extended Contract Net Protocol. 701-710 2009 IEA/AIE http://dx.doi.org/10.1007/978-3-642-02568-6_71 conf/ieaaie/2009 db/conf/ieaaie/ieaaie2009.html#HsiehC09