1. Barham V. Devlin R. A. &Owusu R.(2017).Strategic philanthropists: Who are they and do they matter? (Working paper X 1717 E Department of Economics Faculty of Social Sciences University of Ottawa).https://socialsciences.uottawa.ca/economics/sites/socialsciences.uottawa.ca.economics/files/1717erev_0.pdf
2. Bekkers R. Boonstoppel E. &De Wit A.(2018a).Giving in The Netherlands panel survey – User manual (version 2.9). Center for Philanthropic Studies Vrije Universiteit.https://osf.io/4unf9/
3. Bekkers R. deWit A. &Felix S.(2018b).Twenty years of philanthropic giving in The Netherlands. Paper presented at the 46thARNOVA conference Grand Rapids MI.
4. To Give or Not to Give, That Is the Question: How Methodology Is Destiny in Dutch Giving Data
5. Breen O. B. &Quinn P.(2019).Philanthropy giving in Ireland: A scoring project. The European Research Network on Philanthropy 9th International Conference. Basel Switzerland.