1. Berger, S., in press. Karl Polanyi's and Karl William Kapp's Substantive Economics: Important Insights from the Kapp-Polanyi Correspondence. Review of Social Economy.
2. Towards a political institutional economics: Kapp's Social Costs, Lowe's Instrumental Analysis, and the European Institutionalist approach to environmental policy;Berger;Journal of Economic Issues,2007
3. Max Weber's postulate of ‘freedom’ from value judgements;Blum;American Journal of Sociology,1944
4. Professor Kapp's approach to a science of man in society in the light of the emerging new consciousness and social order;Blum,1977
5. Die Bedeutung des Universalen für alternative Theorien der Gesellschaft: Max Weber und William Kapp;Blum,1982