@inproceedings{quercia08mobirate,
 author = {Daniele Quercia and Stephen Hailes and Licia Capra},
 title = {{MobiRate: Making Mobile Raters Stick to their Word}}, 
 booktitle = {Proceedings of the $10^{th}$ ACM  International Conference on Ubiquitous Computing (UbiComp)}
 year = {2008},
 month={September},
 pages = {},
 address = {Seoul, Korea},
 Theme   = {Security Issues in Mobile Computing},
 URL       = {http://www.cs.ucl.ac.uk/staff/d.quercia/publications/quercia08mobirate.pdf},
 }