@Article{gmd-11-2475-2018,
AUTHOR = {Luo, L. and Zhang, Z. and Ma, W. and Yi, S. and Zhuang, Y.},
TITLE = {PIC v1.3: comprehensive R package for computing permafrost indices   with
daily weather observations and atmospheric forcing over the Qinghai--Tibet
Plateau},
JOURNAL = {Geoscientific Model Development},
VOLUME = {11},
YEAR = {2018},
NUMBER = {6},
PAGES = {2475--2491},
URL = {https://gmd.copernicus.org/articles/11/2475/2018/},
DOI = {10.5194/gmd-11-2475-2018}
}