Thomas R. Ervolina Markus Ettl Young M. Lee Daniel J. Peters Simulating order fulfillment with product substitutions in an assemble-to-order supply chain. 2012-2020 2006 conf/wsc/2006 Winter Simulation Conference http://doi.acm.org/10.1145/1218112.1218479 db/conf/wsc/wsc2006.html#ErvolinaELP06