@article{generalizationofdoobsinequalityanda,
  title = {Generalization of Doob's Inequality and A Tighter Estimate on Look-back Option Price},
  year = {2018},
  eprint = {1807.02243},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1807.02243v2},
}