@article{Chen_2021,
title={Age of the Silurian Wuxiahe Formation in Langao,
Northwest China: New conodont data},
volume={30},
ISSN={1871-174X},
url={http://dx.doi.org/10.1016/j.palwor.2020.12.004},
DOI={10.1016/j.palwor.2020.12.004},
number={4},
journal={Palaeoworld},
publisher={Elsevier BV},
author={Chen,
Zhong-Yang and Männik,
Peep and Tang,
Peng and Wang,
Jian and Ma,
Jun-Ye and Luan,
Xiao-Cong},
year={2021},
month=dec,
pages={649–658} }