1. ISO/IEC, ISO/IEC 14143-1:2007(R2019): Information technology — Software measurement — Functional size measurement — Part 1: Definition of concepts, 2007.
2. Measuring application development productivity;Albrecht;Proc. Joint SHARE/GUIDE/IBM Appl. Dev. Symp.,1979
3. ISO/IEC, ISO/IEC 24570:2005: Software engineering — NESMA functional size measurement method version 2.1 — Definitions and counting guidelines for the application of Function Point Analysis, 2005.
4. ISO/IEC, ISO/IEC 29881:2010: Information technology — Systems and software engineering — FiSMA 1.1 functional size measurement method, 2010.
5. Software Sizing and Estimating: Mk II FPA (Function Point Analysis);Symons,1991