Literature about Snowballing
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The following reviews focus on and discuss the application of snowballing.

 - Ros, R., Bjarnason, E., & Runeson, P. (2017). A Machine Learning Approach for Semi-Automated Search and Selection in Literature Studies. Proceedings of the 21st International Conference on Evaluation and Assessment in Software Engineering - EASE’17. doi:10.1145/3084226.3084243

 - Choong MK, Galgani F, Dunn AG, Tsafnat G. Automatic evidence retrieval for systematic reviews. J Med Internet Res. 2014 Oct 1;16(10):e223. doi: 10.2196/jmir.3369. PMID: 25274020; PMCID: PMC4211030.

 - Turki H. Citation analysis is also useful to assess the eligibility of biomedical research works for inclusion in living systematic reviews. (Comment) J Clin Epidemiol. 2018 May;97:124-125. doi: 10.1016/j.jclinepi.2017.11.002. Epub 2017 Nov 11. PMID: 29138103.

 - Greenhalgh T, Peacock R. Effectiveness and efficiency of search methods in systematic reviews of complex evidence: audit of primary sources. BMJ. 2005 Nov 5;331(7524):1064-5. doi: 10.1136/bmj.38636.593461.68. Epub 2005 Oct 17. PMID: 16230312; PMCID: PMC1283190.

 - Felizardo, K. R., da Silva, A. Y. I., de Souza, É. F., Vijaykumar, N. L., & Nakagawa, E. Y. (2018). Evaluating strategies for forward snowballing application to support secondary studies updates. Proceedings of the XXXII Brazilian Symposium on Software Engineering - SBES ’18. doi:10.1145/3266237.3266240

 - Badampudi, D., Wohlin, C., & Petersen, K. (2015). Experiences from using snowballing and database searches in systematic literature studies. Proceedings of the 19th International Conference on Evaluation and Assessment in Software Engineering - EASE ’15. doi:10.1145/2745802.2745818

 - Claes Wohlin. 2014. Guidelines for snowballing in systematic literature studies and a replication in software engineering. In Proceedings of the 18th International Conference on Evaluation and Assessment in Software Engineering (EASE '14). Association for Computing Machinery, New York, NY, USA, Article 38, 1–10. <https://doi.org/10.1145/2601248.2601268>

 - Mourão, Erica, et al. "Investigating the use of a hybrid search strategy for systematic reviews." 2017 ACM/IEEE International Symposium on Empirical Software Engineering and Measurement (ESEM). IEEE, 2017.

 - Mourão, Erica, et al. "On the performance of hybrid search strategies for systematic literature reviews in software engineering." Information and software technology 123 (2020): 106294.

 - van Haastrecht, Max, et al. "SYMBALS: A systematic review methodology blending active learning and snowballing." Frontiers in research metrics and analytics 6 (2021): 685591.

 - Mendes, Emilia, et al. "Search strategy to update systematic literature reviews in software engineering." 2019 45th Euromicro Conference on Software Engineering and Advanced Applications (SEAA). IEEE, 2019.

 - Wohlin, Claes. "Second-generation systematic literature studies using snowballing." Proceedings of the 20th International Conference on Evaluation and Assessment in Software Engineering. 2016.

 - Wohlin, Claes, et al. "Successful combination of database search and snowballing for identification of primary studies in systematic literature studies." Information and Software Technology 147 (2022): 106908.

 - Jalali, Samireh, and Claes Wohlin. "Systematic literature studies: database searches vs. backward snowballing." Proceedings of the ACM-IEEE international symposium on Empirical software engineering and measurement. 2012.

 - Marshall, Christopher, and Pearl Brereton. "Tools to support systematic literature reviews in software engineering: A mapping study." 2013 ACM/IEEE international symposium on empirical software engineering and measurement. IEEE, 2013.

 - Felizardo, Katia Romero, et al. "Using forward snowballing to update systematic reviews in software engineering." Proceedings of the 10th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement. 2016.