Paper  bibtex   

@article{ dblp1687117,
  title = {Predicting User Engagement in Twitter with Collaborative Ranking},
  author = {Ernesto Diaz-Aviles and Hoang Thanh Lam and Fabio Pinelli and Stefano Braghin and Yiannis Gkoufas and Michele Berlingerio and Francesco Calabrese},
  author_short = {Diaz-Aviles, E. and Thanh Lam, H. and Pinelli, F. and Braghin, S. and Gkoufas, Y. and Berlingerio, M. and Calabrese, F.},
  bibtype = {article},
  type = {article},
  year = {2014},
  key = {dblp1687117},
  id = {dblp1687117},
  biburl = {http://www.dblp.org/rec/bibtex/journals/corr/Diaz-AvilesLPBGBC14},
  url = {http://arxiv.org/abs/1412.7990},
  journal = {CoRR},
  volume = {abs/1412.7990},
  text = {CoRR abs/1412.7990 (2014)}
}