@article{JMLR:v22:20-255,
  author  = {Ali Ramezani-Kebrya and Fartash Faghri and Ilya Markov and Vitalii Aksenov and Dan Alistarh and Daniel M. Roy},
  title   = {NUQSGD: Provably Communication-efficient Data-parallel SGD via Nonuniform Quantization},
  journal = {Journal of Machine Learning Research},
  year    = {2021},
  volume  = {22},
  number  = {114},
  pages   = {1--43},
  url     = {http://jmlr.org/papers/v22/20-255.html}
}