1. Asher H. Cost‐Quality Relations in the Airframe Industry Research Memorandum R‐291 Rand Corporation Santa Monica Calif. July 1 1956.
2. Carlson J. G. H. “Cubic Learning Curves: Precision Tool for Labor Estimating ” Manufacturing Engineering and Management Nov. 1973 pp. 22–25.
3. Cochran E. B. “New Concepts of the Learning Curve ” Journal of Industrial Engineering July–Aug. 1960 pp. 317–327.
4. Conway R. W. and Schultz A. Jr. “The Manufacturing Progress Function ” Journal of Industrial Engineering Jan.–Feb. 1959 pp. 39–53.
5. Diekmann J. R. Horn D. L. and O'Connor M. H. “Utilization of Learning Curves in Damage for Delay Claims ” Project Management Quarterly Dec. 1982 pp. 67–71.