A measure of mental effort related to program clarity.

A Review and Evaluation of Software Science

ACM Computing Surveys (CSUR)

Analyzer-generated and human-judged predictors of computer program readability

CHI '82 Proceedings of the 1982 Conference on Human Factors in Computing Systems

Measuring computer program comprehension

SIGCSE '80 Proceedings of the eleventh SIGCSE technical symposium on Computer science education

Metrics in software quality assurance

ACM '81 Proceedings of the ACM '81 conference

Measurement of program complexity by the pair: (Cyclomatic Number, Operator Count)

ACM SIGPLAN Notices