F. Heemstra

Calibrating a software cost estimation model: why and how

M. van Genuchten, A. M. E. Culenaere, Fj Fred Heemstra, 1987 .

Dealing with risk : beyond gut feeling : an approach to risk management in software engineering

Rj Rob Kusters, Fj Fred Heemstra, R Nijhuis, 1997 .

Function point analysis: evaluation of a software cost estimation model

Fj Fred Heemstra, Rj Rob Kusters, Fj Fred Heemstra, 1991 .