Nicolò Cesa-Bianchi Gábor Lugosi Potential-Based Algorithms in Online Prediction and Game Theory. 48-64 2001 conf/colt/2001 COLT/EuroCOLT http://link.springer.de/link/service/series/0558/bibs/2111/21110048.htm db/conf/colt/colt2001.html#Cesa-BianchiL01