Frank Tip Robert M. Fuhrer Adam Kiezun Michael D. Ernst Ittai Balaban Bjorn De Sutter Refactoring using type constraints. 9 2011 33 ACM Trans. Program. Lang. Syst. 3 http://doi.acm.org/10.1145/1961204.1961205 db/journals/toplas/toplas33.html#TipFKEBS11