BibTex format
@article{Bao:2017:10.1002/2017GL074611,
author = {Bao, M and Tan, X and Hartmann, DL and Ceppi, P},
doi = {10.1002/2017GL074611},
journal = {Geophysical Research Letters},
pages = {8011--8016},
title = {Classifying the tropospheric precursor patterns of sudden stratospheric warmings},
url = {http://dx.doi.org/10.1002/2017GL074611},
volume = {44},
year = {2017}
}