References
- Feller , W. 1968 . An Introduction to Probability Theory and Its Applications, , 3rd ed. , Vol. 1 , New York : John Wiley .
- Mosteller , F. 1962 . “Understanding the Birthday Problem” . The Mathematics Teacher , 55 : 322 – 325 .
- Mosteller , F. 1987 . Fifty Challenging Problems in Probability , New York : Dover Publications .