- https://www.researchgate.net/publication/310802053_Collaboration_in_Multi-user_Immersive_Virtual_Environment
- This link leads to a research paper titled “Collaboration in Multi-user Immersive Virtual Environment.”
- The image shown is from a hierarchical collaboration model proposed by Okada in 2007.
- This link leads to a research paper titled “Collaboration in Multi-user Immersive Virtual Environment.”