@conference{ABM15,
  title = "Optimizing Display Advertising in Online Social Networks",
  author = "Zeinab Abbassi, Aditya Bhaskara, Vishal Misra",
  year = "2015",
  month = "may",
  booktitle = "24th International World Wide Web Conference (WWW 2015)",
  address = "Florence, Italy",
}