@inproceedings{adrian1997wave,
title={Wave breaking for nonlinear nonlocal shallow water equations},
author={Adrian Constantin, and Joachim Escher},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203332398405568},
booktitle={Acta Mathematica},
volume={181},
number={2},
pages={229-243},
year={1997},
}
Adrian Constantin, and Joachim Escher. Wave breaking for nonlinear nonlocal shallow water equations. 1997. Vol. 181. In Acta Mathematica. pp.229-243. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203332398405568.