@inproceedings{victor2013area,
title={AREA GROWTH AND RIGIDITY OF SURFACES WITHOUT CONJUGATE POINTS},
author={Victor Bangert, and Patrick Emmerich},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160914080601718356980},
booktitle={Journal of Differential Geometry},
volume={94},
number={3},
pages={367-385},
year={2013},
}
Victor Bangert, and Patrick Emmerich. AREA GROWTH AND RIGIDITY OF SURFACES WITHOUT CONJUGATE POINTS. 2013. Vol. 94. In Journal of Differential Geometry. pp.367-385. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160914080601718356980.