@inproceedings{thebottomupevolutionofrepresentationsin,
  title = {The Bottom-up Evolution of Representations in the Transformer: A Study with Machine Translation and Language Modeling Objectives},
  author = {Elena Voita and Rico Sennrich and Ivan Titov},
  year = {2019},
  booktitle = {IJCNLP 2019 11},
  eprint = {1909.01380},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1909.01380v1},
}