Add research item in doc (pytest-dev#12147)

doc/en/explanation/flaky.rst

@@ -105,7 +105,7 @@ This is a limited list, please submit an issue or pull request to expand it!
 * Gao, Zebao, Yalan Liang, Myra B. Cohen, Atif M. Memon, and Zhen Wang. "Making system user interactive tests repeatable: When and what should we control?." In *Software Engineering (ICSE), 2015 IEEE/ACM 37th IEEE International Conference on*, vol. 1, pp. 55-65. IEEE, 2015.  `PDF <http://www.cs.umd.edu/~atif/pubs/gao-icse15.pdf>`__
 * Palomba, Fabio, and Andy Zaidman. "Does refactoring of test smells induce fixing flaky tests?." In *Software Maintenance and Evolution (ICSME), 2017 IEEE International Conference on*, pp. 1-12. IEEE, 2017. `PDF in Google Drive <https://drive.google.com/file/d/10HdcCQiuQVgW3yYUJD-TSTq1NbYEprl0/view>`__
 *  Bell, Jonathan, Owolabi Legunsen, Michael Hilton, Lamyaa Eloussi, Tifany Yung, and Darko Marinov. "DeFlaker: Automatically detecting flaky tests." In *Proceedings of the 2018 International Conference on Software Engineering*. 2018. `PDF <https://www.jonbell.net/icse18-deflaker.pdf>`__
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+*  Dutta, Saikat and Shi, August and Choudhary, Rutvik and Zhang, Zhekun and Jain, Aryaman and Misailovic, Sasa. "Detecting flaky tests in probabilistic and machine learning applications." In *Proceedings of the 29th ACM SIGSOFT International Symposium on Software Testing and Analysis (ISSTA)*, pp. 211-224. ACM, 2020. `PDF <https://www.cs.cornell.edu/~saikatd/papers/flash-issta20.pdf>`__
 
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