Update README.md
Added new empirical studies using RefactoringMiner
@@ -104,6 +104,8 @@ RefactoringMiner has been used in the following studies:
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.
+15. Ana Carla Bibiano, Eduardo Fernandes, Daniel Oliveira, Alessandro Garcia, Marcos Kalinowski, Baldoino Fonseca, Roberto Oliveira, Anderson Oliveira, and Diego Cedrim, "A Quantitative Study on Characteristics and Effect of Batch Refactoring on Code Smells," *13th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement* (ESEM 2019), Porto de Galinhas, Brazil, September 16-20, 2019.
+16. Eman Abdullah AlOmar, Mohamed Wiem Mkaouer, Ali Ouni, and Marouane Kessentini, "Do Design Metrics Capture Developers Perception of Quality? An Empirical Study on Self-Affirmed Refactoring Activities," *13th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement* (ESEM 2019), Porto de Galinhas, Brazil, September 16-20, 2019.
# Contributors
