External link
https://dl.acm.org/doi/abs/10.1145/3366423.3380217
BibTeX
@inproceedings{papadopoulos2020keeping, title={Keeping out the masses: Understanding the popularity and implications of internet paywalls}, author={Papadopoulos, Panagiotis and Snyder, Peter and Athanasakis, Dimitrios and Livshits, Benjamin}, booktitle={Proceedings of The Web Conference 2020}, pages={1433—1444}, year={2020} }