Mohammad Ghodsi Hamid Mahini Vahab S. Mirrokni Morteza Zadimoghaddam Permutation betting markets: singleton betting with extra information. 180-189 2008 ACM Conference on Electronic Commerce http://doi.acm.org/10.1145/1386790.1386821 conf/sigecom/2008 db/conf/sigecom/sigecom2008.html#GhodsiMMZ08