1. Ackoff, R. L. (1978). The art of problem solving. Hoboken, NJ: Wiley.
2. Chittaro, L., & Kumar, A. N. (1998). Reasoning about function and its application to engineering. Artificial Intelligence in Engineering, 12, 331–336.
3. Cummins, R. (1975). Functional analysis. Journal of Philosophy, 72, 741–765.
4. Fedosov, Y. (2013, August 1–3). Statistics of “Elementary Functions” (pp. 59–67). Proceedings of the International Conference TRIZfest-2013, Kiev, Ukraine, MATRIZ, St. Petersburg Polytechnic University Publishing House.
5. Feygenson, O. (2012, August 2–4). Specifics of function analysis for engineering systems at the exploitation stage. Paper presented at the MATRIZ Conference TRIZ-Fest 2012, at Lappeenranta University of Technology, Finland.