Following books and websites have been consulted for this experiment.
You are suggested to go through them for further details.

Bibliography

1. Fundamentals of Software Engineering, Rajib Mall, Prentice-Hall of India, 3rd Edition, 2009
2. Software Engineering, Ian Sommerville, Addison Wesley Longman, 9th Edition, March 2010

Webliography

1. COCOMO
2. Halstead complexity measures
3. COCOMO (Constructive Cost Model), Seminar on Software Cost Estimation WS 2002 / 2003, presented by Nancy Merlo – Schett
4. The Halstead metrics
5. Software Engineering, National Program on Technology Enhanced Learning
6. Halstead Metrics, Verifysoft Technology