Renner, M Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society; Max Planck Institute for Biological Cybernetics, Max Planck Society;
https://www.linux-community.de/ausgaben/linuxuser/2003/07/interne-netze-sicher-zu-einem-grossen-virtuellen-netz-verbinden/ (Publisher version)
Renner, M. (2003). VPN für Arme. LinuxUser, 2003(07).