@article{atwostepframeworkforarbitragefree,
  title = {A Two-Step Framework for Arbitrage-Free Prediction of the Implied Volatility Surface},
  author = {Wenyong Zhang and Lingfei Li and Gongqiu Zhang},
  year = {2021},
  eprint = {2106.07177},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2106.07177v2},
}