@inproceedings{kefeng2011a, title={A note on modular forms and generalized anomaly cancellation formulas}, author={Kefeng Liu, and Yong Wang}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191221111524545948657}, booktitle={arXiv preprint arXiv:1109.5794}, year={2011}, }