- https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-092-introduction-to-programming-in-java-january-iap-2010/
- http://codeforces.com/blog/entry/7018 (Reading Input-Output)
- Sorting in Java (http://codeforces.com/blog/entry/7108)
- http://www.iitk.ac.in/esc101/2010Jan/index.html
- http://www.iitk.ac.in/esc101/08Jul/