1. Einstein, A. “Principles of Research,” 1918 address to the Physical Society, Berlin, reprinted in Ideas and Opinions, Crown, 1954. Available at: http://www.cs.ucla.edu/∼slu/on_research/einstein_essay2.html. Access on April 3, 2008.
2. More is different;Anderson;Science,1972
3. Weinberg, S. “Reductionism Redux,” The New York Review of Books, October 5, 1995. Reprinted in Weinberg, Steven., Facing Up, Harvard University Press, 2001. http://www.idt.mdh.se/kurser/ct3340/ht02/Reductionism_Redux.pdf.
4. Abstract data types and the development of data structures;Guttag;Commun ACM,1977