- http://bigocheatsheet.com
- https://www.interviewcake.com/article/big-o-notation-time-and-space-complexity
- http://www.nobigo.com/
- https://onedrive.live.com/view.aspx?resid=698BA9C208A5B31D!32719&app=OneNote&authkey=!AP1TevOlacebRns
- http://codingforinterviews.com/books
- http://blog.codingforinterviews.com/gregs-google-interview/
- http://ocw.mit.edu/courses/#electrical-engineering-and-computer-science
- http://www.cs.uiuc.edu/~jeffe/teaching/algorithms/
- http://www.eecs.berkeley.edu/~rcs/research/interactive_latency.html