@INPROCEEDINGS{RevMon-SODA,
    author = "Baharak Rastegari and Anne Condon and Kevin Leyton-Brown",
    title = "Stepwise Randomized Combinatorial Auctions Achieve Revenue Monotonicity",
    booktitle = "ACM-SIAM Symposium on Discrete Algorithms (SODA)",
    pages =  {738--747},
    year = "2009"
}