1. Flajolet, P., Sedgewick, R.: Analytic combinatorics. Cambridge University Press, Cambridge (2008)
2. Gomez, R.D., Burke, E.R., Adly, A.A., Mayergoyz, I.D., Gorczyca, J.A., Kryder, M.H.: Microscopic investigations of overwritten data. Journal of Applied Physics 73(10) (1993)
3. Graham, R.L., Knuth, D.E., Patashnik, O.: Concrete Mathematics, 2nd edn. A Foundation for Computer Science (1994)
4. Gutmann, P.: Secure Deletion of Data from Magnetic and Solid-State Memory. In: The Sixth USENIX Security Symposium (1996)
5. James, D.G.: Forensically unrecoverable hard drive data destruction Whitepaper (2006), http://infosecwriters.com