@article{v003a006,
 author = {David Zuckerman},
 title = {Linear Degree Extractors and the Inapproximability of Max Clique and Chromatic Number},
 year = {2007},
 pages = {103-128},
 doi = {10.4086/toc.2007.v003a006},
 publisher = {Theory of Computing},
 journal = {Theory of Computing},
 volume = {3},
 number = {1},
 URL = {http://www.theoryofcomputing.org/articles/v003a006},
}