@inproceedings{Noll:2009aa,
    Author = {Ching-Man Au Yeung and Michael G. Noll and Nicholas Gibbins and Christoph Meinel and Nigel Shadbolt},
    Booktitle = {WebSci '09: Proceedings of the Web Science Conference (WebSci Society On-Line)},
    Month = {March},
    Title = {On Measuring Expertise in Collaborative Tagging Systems},
    Year = {2009}
}