Xiaohong Guan Chen Song Yu-Chi Ho Qianchuan Zhao Constrained Ordinal Optimization - A Feasibility Model Based Approach. 279-299 2006 16 Discrete Event Dynamic Systems 2 http://dx.doi.org/10.1007/s10626-006-8137-5 db/journals/deds/deds16.html#GuanSHZ06