Paper  bibtex   

@article{greco_tragedy_2004,
	title = {The tragedy of the digital commons},
	url = {https://link.springer.com/article/10.1007/s10676-004-2895-2},
	journal = {Ethics and Information Technology},
	author = {Greco, G. M. and Floridi, L.},
	year = {2004},
	keywords = {colcommon}
}