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Valerdi, R. and Liu, K., Parametric Cost Estimation for Human Systems Integration, in The Economics of Human Systems Integration: Valuation of Investments in People’s Training and Education, Safety and Health, and Work Productivity, Rouse, W. B. (Ed.), Wiley, 2010.

Valerdi, R., Cost Estimation Toolset, in Evolving Toolbox for Complex Project Management, Gorod, A., Hallo, L., Ireland, V., Gunawan, I. (Eds.), CRC Press, 2019.

Madachy, R. and Valerdi, R., Expert COSYSMO Systems Engineering Cost Model and Risk Advisor, in Handbook of Military and Defense Operations Research, Scala, N. and Howard, J. P. (Eds.), CRC Press, 2020.