@conference{santos2012WAC,
    
    author = {Patxi Galán-García and Carlos Laorden and P.G. Bringas},
    title = {Towards a more Efficient and Personalized Advertisement Content in Online Social Networks},
    booktitle= {Proceedings of the 5th Workshop for Ph.D. Students (PIKM 2012) at the ACM Conference on Information and Knowledge Management (CIKM 2012)},
    year={2012},
    note ={in press},   
}