Spyros Angelopoulos Atish Das Sarma Avner Magen Anastasios Viglas On-Line Algorithms for Market Equilibria. 596-607 2005 conf/cocoon/2005 COCOON http://dx.doi.org/10.1007/11533719_61 db/conf/cocoon/cocoon2005.html#AngelopoulosSMV05