@article{playtimemeasurementwithsurvivalanalysis,
  title = {Playtime Measurement with Survival Analysis},
  author = {Markus Viljanen and Antti Airola and Jukka Heikkonen and Tapio Pahikkala},
  year = {2017},
  eprint = {1701.02359},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1701.02359v1},
}