1. Ambient Software Evoluton Group IJaDataset 2.0. http://secold.org/projects/seclone. June 2017.
2. Apache Lucene. https://lucene.apache.org/core/. June 2017.
3. BigCloneBench. https://github.com/clonebench/BigCloneBench. June 2017.
4. A theory of parameterized pattern matching: algorithms and applications;Baker,1993
5. On finding duplication and near-duplication in large software systems;Baker,1995