@inproceedings{reese1981calibrated,
title={Calibrated geometries},
author={Reese Harvey, and H. Blaine Lawson Jr.},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203256675162313},
booktitle={Acta Mathematica},
volume={148},
number={1},
pages={47-157},
year={1981},
}