1. OWASP Homepage.
https://www.owasp.org
2. Cwe/sans top 25 most dangerous software errors (2011).
http://www.sans.org/top25-software-errors/
3. 2011 Trustwave Global Security Report.
https://www.trustwave.com
4. Python 3 - CGI Programming.
https://www.tutorialspoint.com
5. Stack Overflow’s annual Developer Survey (2019).
https://insights.stackoverflow.com/survey/2019#most-popular-technologies