@conference {4382, title = {Sequential mixed auctions}, booktitle = {The 13th IEEE International Conference on Electronic Commerce}, year = {2011}, month = {03/08/2011}, address = {Liverpool, UK}, keywords = {agents, auctions, optimization}, author = {Boris Mikhaylov and Jes{\'u}s Cerquides and Juan A. Rodr{\'\i}guez-Aguilar} }