On the complexity of measuring software complexity
G. Michael Schneider, Robert L. Sedlmeyer, Joe Kearney · 1981
The term software complexity (program quality, program complexity,...) has been used by software engineering researchers to denote the testability, maintainability, readability, and/or comprehensibility of a program. Curtis points out a common bond that unites all these concepts: a program's complexity determines how difficult it is for programmers to work with.