Durovis Dive A professional alternative to Google Cardboard - Gizmochina
Durovis Essentials Lens Set 10 - 10 Bikonvexe PMMA-Linsen für Virtual Reality Headsets und 3D-Brillen Google Cardboard: Amazon.de: Elektronik & Foto
Durovis - Dive Accessories
Google Cardboard: What is it and how you can build your own? - Neowin
Velleman VR-Gear 3D Virtual Reality Glass-Viewer Kit for Smartphone, 1 Grade to 12 Grade, 2.95" x ca. 5.73" Body Size: Amazon.com: Industrial & Scientific
How to Make Google Cardboard | Turn Your Boring Smartphone Into Cool VR Headset : 5 Steps - Instructables