@inproceedings{j2007einstein, title={Einstein metrics on connected sums of $ S^ 2\ times S^ 3$}, author={J Kollár}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160908192708020059663}, booktitle={Journal of Differential Geometry}, volume={75}, pages={259-272}, year={2007}, }