Bibiliography
[1] R. E. Greenwood A. M. Gleason and L. M. Kelly. The William Lowell Putnam Mathematical Competition Problems & Solutions: 1938-1964. The Mathematical Association of America, Reissued 2003.
[2] Martin Aigner and Gunter M. Ziegler. Proofs from THE BOOK. Springer-Verlag, 2nd edition, 2001.
[3] Wikipedia contributors. Cantor-bernstein-schroeder theorem. Wikipedia, the free encyclopedia. http://en.Wikipedia.org/wiki/Cantor-Bernstein-Schroeder theorem.
[4] Wikipedia contributors. Christian Goldbach. Wikipedia, the free encyclopedia. http://en.Wikipedia.org/wiki/Goldbach.
[5] Wikipedia contributors. Erdos number. Wikipedia, the free encyclopedia. http://en.Wikipedia.org/wiki/Erdos number.
[6] Wikipedia contributors. The four color theorem. Wikipedia, the free encyclopedia. http://en.Wikipedia.org/wiki/Four color theorem.
[7] Leonard F. Klosinski Gerald L. Alexanderson and Loren C. Larson. The William Lowell Putnam Mathematical Competitions Problems & Solutions: 1965 - 1984. The Mathematical Association of America, Reissued 2003. 413 414 INDEX
[8] Richard K. Guy. The lighthouse theorem, Morley & Malfatti – a budget of paradoxes. American Mathematical Monthly, 2007.
[9] Bjorn Poonen Kiran S. Kedlaya and Ravi Vakil. The William Lowell Putnam Mathematical Competition 1985-2000: Problems Solutions, and Commentary. The Mathematical Association of America, 2002.
[10] C. W. H. Lam. The search for a finite projective plane of order 10. www.www.cecm.sfu.ca/organics/...tml/paper.html.
[11] Saunders MacLane. Categories for the Working Mathematician. Springer-Verlag, 2nd edition, 1998.
[12] John J. O’Connor and Edmund F. Robertson. http://wwwhistory.mcs.st-andrews.ac.uk/history/index.html. The MacTutor History of Mathematics archive.
[13] Stanislaw Radziszowski. Small ramsey numbers. http://www.combinatorics.org/Surveys/ds1.pdf.
[14] Gian-Carlo Rota. Indiscrete Thoughts. Birkhäuser, 1997.
[15] M. Satyanarayana. none given. Math. Quest. Educ. Times (New Series), 1909.
[16] D. J. Struik. A Source Book in Mathematics, 1200-1800. Princeton University Press, 1986.
[17] Alfred North Whitehead and Bertrand Russell. Principia Mathematica. Cambridge University Press, 1910.