Rui Dai Sridhar Narasimhan D. J. Wu E-Sourcing: Buyer's Efficient Structure for Purchasing Preparation Process. 2005 conf/hicss/2005 HICSS http://doi.ieeecomputersociety.org/10.1109/HICSS.2005.219 db/conf/hicss/hicss2005-8.html#DaiNW05