1. Akamai. 〈http://www.akamai.com/〉.
2. Minimizing delivery cost in scalable streaming content distribution systems;Almeida;IEEE Transactions on Multimedia,2004
3. Amazon Simple Storage Service (Amazon S3). 〈http://aws.amazon.com/s3/〉.
4. Approximation algorithms for data placement problems;Baev;SIAM Journal on Computing,2008
5. Baev Ivan D, Rajaraman Rajmohan. Approximation algorithms for data placement in arbitrary networks. In: Proceedings of the 12th annual ACM-SIAM symposium on discrete algorithms (SODA); 2001. p. 661–70.