@inproceedings{ronald2005a,
title={A new sufficient condition for Hamiltonian graphs},
author={Ronald J. Gould, and Kewen Zhao},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203618094765898},
booktitle={Arkiv for Matematik},
volume={44},
number={2},
pages={299-308},
year={2005},
}

Ronald J. Gould, and Kewen Zhao. A new sufficient condition for Hamiltonian graphs. 2005. Vol. 44. In Arkiv for Matematik. pp.299-308. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203618094765898.