1. 2017. After mixed year mobile AR to drive $108 billion VR/AR market by 2021. (2017). https://goo.gl/P9N0z0. 2017. After mixed year mobile AR to drive $108 billion VR/AR market by 2021. (2017). https://goo.gl/P9N0z0.
2. 2017. Facebook. (2017). https://www.facebook.com/. 2017. Facebook. (2017). https://www.facebook.com/.
3. 2017. Facebook Oculus Rift. (2017). https://www.oculus.com. 2017. Facebook Oculus Rift. (2017). https://www.oculus.com.
4. 2017. HTC Vive. (2017). https://www.htcvive.com. 2017. HTC Vive. (2017). https://www.htcvive.com.
5. 2017. Oculus Video. (2017). http://www.oculus.com/experiences/rift/926562347437041/. 2017. Oculus Video. (2017). http://www.oculus.com/experiences/rift/926562347437041/.