@inproceedings{kamvar2003freeriding,
 author = {Sepandar D. Kamvar and Mario T. Schlosser and Hector Garcia-Molina},
 booktitle = {Euro-Par},
 title = {Incentives for Combatting Freeriding on P2P Networks},
 url = {https://nlp.stanford.edu/pubs/kamvar2003freeriding.pdf},
 year = {2003}
}