@Article{toorn2020a,
  author     = {van der Toorn, Olivier and Sperotto, Anna},
  journal    = {Digital Threats: Research and Practice},
  title      = {{Looking Beyond the Horizon: Thoughts on Proactive Detection of Threats}},
  year       = {2020},
  address    = {New York, NY, USA},
  articleno  = {4},
  issue_date = {March 2020},
  numpages   = {13},
  publisher  = {Association for Computing Machinery},
}