Byungjoon Yoo Vidyanand Choudhary Tridas Mukhopadhyay A Study of Sourcing Channels for Electronic Business Transactions. 145-170 2011 28 J. Manag. Inf. Syst. 2 https://doi.org/10.2753/mis0742-1222280206 db/journals/jmis/jmis28.html#YooCM11