@article{Halperin Grobman_1993, title={El modelo de utilidad}, url={https://revistas.pucp.edu.pe/index.php/derechopucp/article/view/6653}, DOI={10.18800/derechopucp.199301.005}, number={47}, journal={Derecho PUCP}, author={Halperin Grobman, Jorge}, year={1993}, month={dic.}, pages={191-254} }