@article{Chang_2022,
title={COVID-19 increased censorship circumvention and access to sensitive topics in China},
volume={119},
ISSN={1091-6490},
url={http://dx.doi.org/10.1073/pnas.2102818119},
DOI={10.1073/pnas.2102818119},
number={4},
journal={Proceedings of the National Academy of Sciences},
publisher={Proceedings of the National Academy of Sciences},
author={Chang,
Keng-Chi and Hobbs,
William R. and Roberts,
Margaret E. and Steinert-Threlkeld,
Zachary C.},
year={2022},
month=jan }