@inproceedings{balazs2012a,
title={A CHARACTERIZATION OF HARMONIC SPACES },
author={Balazs Csikos, and Marton Horvath},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913224236742779919},
booktitle={Journal of Differential Geometry},
volume={90},
number={3},
pages={383-389},
year={2012},
}
Balazs Csikos, and Marton Horvath. A CHARACTERIZATION OF HARMONIC SPACES . 2012. Vol. 90. In Journal of Differential Geometry. pp.383-389. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913224236742779919.