@article{modellingplayersinmobilepuzzlegames,
  title = {Statistical Modelling of Level Difficulty in Puzzle Games},
  author = {Jeppe Theiss Kristensen and Arturo Valdivia and Paolo Burelli},
  year = {2021},
  eprint = {2107.03305},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2107.03305v2},
}