Chawla, Shuchi; Hartline, Jason D.; Kleinberg, Robert (2007). "Algorithmic pricing via virtual valuations". Proceedings of the 8th ACM conference on Electronic commerce – EC '07. p. 243. arXiv:0808.1671. doi:10.1145/1250910.1250946. ISBN9781595936530.
Chawla, Shuchi; Hartline, Jason D.; Kleinberg, Robert (2007). "Algorithmic pricing via virtual valuations". Proceedings of the 8th ACM conference on Electronic commerce – EC '07. p. 243. arXiv:0808.1671. doi:10.1145/1250910.1250946. ISBN9781595936530.