@inproceedings{Balan:MobiSys09, 
        author    = "R. Balan and N. Ramasubbu and K. Prakobphol and N. Christin and J. Hong",
        title     = "{mFerio}: the design and evaluation of a peer-to-peer mobile payment system",
        booktitle = "Proceedings of ACM MobiSys'09",
        year      = 2009,
        pages     = "291--304",
        address   = "Krakow, Poland", 
        month     = jun
}