Nicolò Cesa-Bianchi Yoav Freund David Haussler David P. Helmbold Robert E. Schapire Manfred K. Warmuth How to use expert advice. 427-485 1997 44 J. ACM 3 http://doi.acm.org/10.1145/258128.258179 db/journals/jacm/jacm44.html#Cesa-BianchiFHHSW97