@inproceedings{conan2009geometric,
title={Geometric structures on G2 and Spin7 manifolds},
author={Conan Leung, and Jae-Hyouk Lee},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160830144531736495562},
booktitle={ATMP},
volume={13},
pages={1-31},
year={2009},
}