Update README.md
Added a new empirical study using RefactoringMiner
@@ -51,8 +51,9 @@ RefactoringMiner has been used in the following studies:
9. Matheus Paixao, "[Software Restructuring: Understanding Longitudinal Architectural Changes and Refactoring](http://discovery.ucl.ac.uk/10060511/)," Ph.D. thesis, Computer Science Department, University College London, July 2018.
10. Mehran Mahmoudi, Sarah Nadi, and Nikolaos Tsantalis, "[Are Refactorings to Blame? An Empirical Study of Refactorings in Merge Conflicts](https://doi.org/10.1109/SANER.2019.8668012)," *26th IEEE International Conference on Software Analysis, Evolution and Reengineering* (SANER 2019), Hangzhou, China, February 24-27, 2019.
11. Bin Lin, Csaba Nagy, Gabriele Bavota and Michele Lanza, "[On the Impact of Refactoring Operations on Code Naturalness](https://doi.org/10.1109/SANER.2019.8667992)," *26th IEEE International Conference on Software Analysis, Evolution and Reengineering* (SANER 2019), Hangzhou, China, February 24-27, 2019.
-12. Sarah Fakhoury, Devjeet Roy, Sk. Adnan Hassan, and Venera Arnaoudova, "[Improving Source Code Readability: Theory and Practice](https://doi.org/10.1109/ICPC.2019.00014)," *27th IEEE/ACM International Conference on Program Comprehension* (ICPC 2019), Montreal, QC, Canada, May 25-26, 2019.
+12. Sarah Fakhoury, Devjeet Roy, Sk. Adnan Hassan, and Venera Arnaoudova, "[Improving Source Code Readability: Theory and Practice](https://dl.acm.org/citation.cfm?id=3339080)," *27th IEEE/ACM International Conference on Program Comprehension* (ICPC 2019), Montreal, QC, Canada, May 25-26, 2019.
13. Carmine Vassallo, Giovanni Grano, Fabio Palomba, Harald C. Gall, and Alberto Bacchelli, "[A large-scale empirical exploration on refactoring activities in open source software projects](https://doi.org/10.1016/j.scico.2019.05.002)," *Science of Computer Programming*, 2019.
+14. Eman Abdullah AlOmar, Mohamed Wiem Mkaouer, and Ali Ouni, "[Can refactoring be self-affirmed?: An exploratory study on how developers document their refactoring activities in commit messages](https://dl.acm.org/citation.cfm?id=3340647)," *3rd International Workshop on Refactoring* (IWOR 2019), Montreal, QC, Canada, May 28, 2019.
## Contributors ##
