Susan Stepney Fiona Polack Ian Toyn Patterns to Guide Practical Refactoring: Examples Targetting Promotion in Z. 20-39 2003 conf/zum/2003 ZB http://link.springer.de/link/service/series/0558/bibs/2651/26510020.htm db/conf/zum/zb2003.html#StepneyPT03a