Jiajie Xu Chengfei Liu Xiaohui Zhao Resource Planning for Massive Number of Process Instances. 219-236 2009 OTM Conferences (1) http://dx.doi.org/10.1007/978-3-642-05148-7_16 conf/otm/2009-1 db/conf/otm/otm2009-1.html#XuLZ09