Bar-Yehuda, R., Bendel, K., Freund, A., & Rawitz, D. Local ratio: a unified framework for approximation algorithms. In memoriam: Shimon Even 1935-2004. ACM computing surveys..
Chicago-viite (17. p.)Bar-Yehuda, Reuven, Keren Bendel, Ari Freund, ja Dror Rawitz. "Local Ratio: A Unified Framework for Approximation Algorithms. In Memoriam: Shimon Even 1935-2004." ACM Computing Surveys. .
MLA-viite (9. p.)Bar-Yehuda, Reuven, et al. "Local Ratio: A Unified Framework for Approximation Algorithms. In Memoriam: Shimon Even 1935-2004." ACM Computing Surveys., .
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.