1. https://www.augment.com/how-augmented-reality-works/
2. https://www.colocationamerica.com/blog/history-of-augmented-reality
3. https://unity3d.com/unity/activation/personal
4. https://www.ptc.com/en/products/vuforia/vuforia-engine/pricing
5. Liu X, Sohn Y-H, Park D-W (2018) Application development with augmented reality technique using Unity 3D and Vuforia. Int J Appl Eng Res 13(21):15068–15071