1. The LAN-simulation: A research and teaching example for refactoring;Demeyer,2005
2. Software maintenance cost estimation and modernization support;Koskinen,2003
3. Refactoring Object-Oriented Frameworks;Opdyke,1992
4. Program Evolution: Processes of Software Change;Lehman,1985
5. Measure it? manage it? ignore it? software practitioners and technical debt;Ernst,2015