1. Albrecht, A.J.: Measuring application development productivity. In: Proceedings of IBM Applications Development Symposium, Monterey, CA, p. 83, 14–17 October 1979
2. Function point counting Practices manual release 4.3.1, January 2010.
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/34989/1/0004-3-1-Part-0-2010-01-17.pdf
3. Boehm, B.W.: Software Engineering Economics. Prentice Hall, Upper Saddle River (1981)
4. Boehm, B.W., et al.: Software Cost Estimation with COCOMO II. Prentice Hall PTR, Seitan (2000)
5. Karner, G.: Resource estimation for objectory projects. Objective Systems SF AB (1993)