1. AEFTA consortium, (1994). Aefta project - Quality plan.
2. AMI, Applications of Metrics in Industry (1992) - ami Handbook, a quantitative approach to software management, CSSE, South Bank Polytechnic, London.
3. Bache R, Bazzana G., (1994), Software metrics for product assessment,McGraw-Hill.
4. Basili V.B., Weiss M.W. (1984), A methodology for collecting valid software engineering data, IEEE Transactions on Software Engineering, 10 (6), Nov. 1984, 728–738.
5. Basili V.B., Rombach H.D. (1988), The TAME Project: Towards Improvement-Oriented