Update README.md

Author: giltirn

README.md

@@ -39,3 +39,9 @@ Comprehensive documentation on the installation and running of Chimbuko, as well
 # Reporting Bugs
 
 If you find a bug, please open an [issue on PerformanceAnalysis github repositoty](https://github.com/CODARcode/PerformanceAnalysis/issues).
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+# Citations
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+For citing Chimbuko, please use:
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+C. Kelly et al., “Chimbuko: A Workflow-Level Scalable Performance Trace Analysis Tool,” in ICPS Proceedings, in ISAV’20. online: Association for Computing Machinery, Nov. 2020, pp. 15–19. doi: 10.1145/3426462.3426465.