@inproceedings{james2007a,
title={A variational principle for KPP front speeds in temporally random shear flows},
author={James Nolen, and Jack Xin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210235401043421},
booktitle={Communications in Mathematical Physics},
volume={269},
number={2},
pages={493-532},
year={2007},
}

James Nolen, and Jack Xin. A variational principle for KPP front speeds in temporally random shear flows. 2007. Vol. 269. In Communications in Mathematical Physics. pp.493-532. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224210235401043421.