Paavilainen et al. (2017)
Also: Paavilainen et al. 2017
A Review of Social Features in Social Network Games
Paavilainen, J., Alha, K. & Korhonen, H. (2017). A Review of Social Features in Social Network Games. Transactions of the Digital Games Research Association. 3(2). PDF
https://doi.org/10.26503/todigra.v3i2.71
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.