@conference {hajiaghayi05, title = {Online Auctions with Re-usable Goods}, booktitle = {Proc. 6th ACM Conf. on Electronic Commerce (EC{\textquoteright}05)}, year = {2005}, pages = {165{\textendash}174}, url = {http://econcs.seas.harvard.edu/files/econcs/files/f188-hajiaghayi.pdf}, author = {Mohammad T. Hajiaghayi and Robert Kleinberg and Mohammad Mahdian and David C. Parkes} }