@article{Bullard_1991, title={Un mundo sin propiedad}, url={https://revistas.pucp.edu.pe/index.php/derechopucp/article/view/6160}, DOI={10.18800/derechopucp.199101.004}, number={45}, journal={Derecho PUCP}, author={Bullard, Alfredo}, year={1991}, month={dic.}, pages={131-157} }