The Cost of Developing Large-Scale Software. - Ray W. Wolverton (IEEE Trans. Computers, 1974)

An Analysis of Competing Software Reliability Models. - George J. Schick; Ray W. Wolverton (IEEE Trans. Software Eng., 1978)

Software cost modeling: Some lessons learned. - Barry W. Boehm; Ray W. Wolverton (J. Syst. Softw., 1980)