@Misc{ 
  GuoKarSte23,
  author = { Guo, Tao and Karagodin, Nikita and Stepanov, Eugene },
  title = { Optimal functional product quantization },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6002/ },
  note = { cvgmt preprint}
}