TY - GEN A1 - Buchholz, Wolfgang A1 - Grawe, Thomas A1 - Lührmann, Matthias T1 - How to apply buyer-supplier-supplier relationships for defining sourcing strategies. 24th Annual International Purchasing and Supply Education and Research Association (IPSERA) Conference: "Preparing for new competitive challenges". Amsterdam, Netherlands. 29. March -1. April 2015 Y1 - 2015 ER -