1. Howe, J. (2006). The rise of crowdsourcing. Wired Magazine, 14(6), 1–4.
2. Adda, G., Sagot, B., Fort, K., Mariani, J., et al. (2011). Crowdsourcing for language resource development: Critical analysis of amazon mechanical turk overpowering use. In: Proceedings of the 5th Language and Technology Conference (LTC 2011). Poznan, Poland.
3. Rubinstein, A. (1982). Perfect equilibrium in a bargaining model. Econometrica, 50(1), 97–109. doi: 10.2307/1912531 .
4. Raiffa, H. (1982). The art and science of negotiation/Howard Raiffa. Cambridge, MA: Belknap Press of Harvard University Press.
5. Stahl, I. (1972). Bargaining theory (pp. 153–157). Stockholm: Stockholm School of Economics.