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2. Levis, B., Miller, B.: 2018 fundraising effectiveness survey report (2018). http://afpfep.org/reports/download/
3. Fundmetric: AI to Maximize Donor Lifetime Value (2021)
4. Lee, G., Raghavan, A., Hobbs, M.: Machine Learning the Donor Journey. Advances in Artificial Intelligence: Proceedings of the 33rd Canadian Artificial Intelligence Conference, pp. 368–374 (2020)
5. Haydon, J.: How to write your best fundraising emails|social media today. https://www.socialmediatoday.com/content/how-write-your-best-fundraising-emails