@misc{wang2011equivalence,
  title={Equivalence of three different kinds of optimal control problems for heat equations and its applications},
  author={Gengsheng Wang and Yashan Xu},
  year={2011},
  eprint={1110.3885},
  archivePrefix={arXiv},
  primaryClass={math.OC},
  url={https://arxiv.org/abs/1110.3885}
}