@inproceedings{xu2016trees,
title={Trees with given maximum degree minimizing the spectral radius},
author={Xu Du, and Lingsheng Shi},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20161124110741998761636},
booktitle={Electronic Journal of Linear Algebra},
volume={31},
pages={335-361},
year={2016},
}

Xu Du, and Lingsheng Shi. Trees with given maximum degree minimizing the spectral radius. 2016. Vol. 31. In Electronic Journal of Linear Algebra. pp.335-361. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20161124110741998761636.