@article{focallossin3dobjectdetection,
  title = {Focal Loss in 3D Object Detection},
  author = {Peng Yun and Lei Tai and Yu-An Wang and Chengju Liu and Ming Liu},
  year = {2018},
  eprint = {1809.06065},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1809.06065v3},
}