@inproceedings{conantopological, title={Topological QFT for Calabi-Yau threefolds and G2-manifolds}, author={Conan Leung}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160831142738414550574}, booktitle={Surveys in differential geometry}, volume={8}, pages={257-267}, }