1. 1989. .ZIP Application Note. https://www.pkware.com/support/zipapp-note/. (1989). 1989. .ZIP Application Note. https://www.pkware.com/support/zipapp-note/. (1989).
2. 1990. GRAPHICS INTERCHANGE FORMAT Version 89a. http://www.w3.org/Graphics/GIF/spec-gif89a.txt. (1990). 1990. GRAPHICS INTERCHANGE FORMAT Version 89a. http://www.w3.org/Graphics/GIF/spec-gif89a.txt. (1990).
3. 1996. Wavefront OBJ File Format Summary. http://www.fileformat.info/format/wavefrontobj/egff.htm. (1996). 1996. Wavefront OBJ File Format Summary. http://www.fileformat.info/format/wavefrontobj/egff.htm. (1996).
4. 2017. CVE – Common Vulnerabilities and Exposures. http://cve.mitre.org/. (2017). 2017. CVE – Common Vulnerabilities and Exposures. http://cve.mitre.org/. (2017).