- 1
- www.wikipedia.org.
- 2
- David P. Williamson and David B.Shmoys, “Design of approximation Algorithms”, ebook (downloadable)
- 3
- MIKHAIL J. ATALLAH AND MARINA BLANTON, “Algorithms and Theory of Computation handbook, Second Edition, Special Topics and Techniques”, CRC Press, Taylor and Francis Group - A Chapman and Hall Book, 2010.
- 4
- ALLEN B. TUCKER, JR., “The computer Science and Engineering Handbook,” CRC Press, 1997.
