@inproceedings{y.2008invariance,
  title={Invariance of Gromov--Witten theory under a simple flop},
  author={Y. Iwao, Yuan-Pin Lee, Hui-Wen Lin, and C.-L Wang},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220415112720459877034},
  year={2008},
}