1. Empirical Study of Object-Oriented Metrics.
2. Assessing Software System Maintainability using Structural Measures and Expert Assessments
3. A hierarchical model for object-oriented design quality assessment
4. Frank Buschmann Kelvin Henney and Douglas Schimdt. 2007. Pattern-oriented Software Architecture: On Patterns and Pattern Language. Vol. 5. John Wiley & Sons. Frank Buschmann Kelvin Henney and Douglas Schimdt. 2007. Pattern-oriented Software Architecture: On Patterns and Pattern Language. Vol. 5. John Wiley & Sons.
5. A metrics suite for object oriented design