Moshe Babaioff Yogeshwer Sharma Aleksandrs Slivkins Characterizing truthful multi-armed bandit mechanisms: extended abstract. 79-88 2009 ACM Conference on Electronic Commerce http://doi.acm.org/10.1145/1566374.1566386 conf/sigecom/2009 db/conf/sigecom/sigecom2009.html#BabaioffSS09