Keilser, J. J. (2011). OpenVPN 2 Cookbook: 100 simple and incredibly effective recipes for harnessing the power of the OpenVPN 2 network. Packt Publishing.

Keilser, Jan Just. OpenVPN 2 Cookbook: 100 Simple and Incredibly Effective Recipes for Harnessing the Power of the OpenVPN 2 Network. Birmingham: Packt Publishing, 2011.

Keilser, Jan Just. OpenVPN 2 Cookbook: 100 Simple and Incredibly Effective Recipes for Harnessing the Power of the OpenVPN 2 Network. Packt Publishing, 2011.