Update README.md
Added new empirical study using RefactoringMiner
@@ -110,7 +110,7 @@ RefactoringMiner has been used in the following studies:
18. Anthony Peruma, "[A preliminary study of Android refactorings](http://dl.acm.org/citation.cfm?id=3340730.3340760)," *6th International Conference on Mobile Software Engineering and Systems* (MOBILESoft 2019), Montreal, Quebec, Canada, May 25-26, 2019.
19. Anthony Peruma, Mohamed Wiem Mkaouer, Michael J. Decker, and Christian D. Newman, "Contextualizing Rename Decisions using
Refactorings and Commit Messages," *19th IEEE International Working Conference on Source Code Analysis and Manipulation* (SCAM 2019), Cleveland, OH, USA, September 30-October 1, 2019.
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+20. Willian Oizumi, Leonardo Da Silva Sousa, Anderson Oliveira, Luiz Matheus Alencar, Alessandro Garcia, Thelma E. Colanzi and Roberto Oliveira, "On the density and diversity of degradation symptoms in refactored classes: A multi-case study," *30th International Symposium on Software Reliability Engineering* (ISSRE 2019), Berlin, Germany, October 28-31, 2019.
# Contributors
The code in package **gr.uom.java.xmi.*** has been developed by [Nikolaos Tsantalis](https://github.com/tsantalis).
