1. Agriculture, forestry and fishery statistics (2018). Statistical books, European Union. Retrieved from https://ec.europa.eu/eurostat/documents/3217494/9455154/KS-FK-18-001-EN-N.pdf/a9ddd7dbc40c-48c9-8ed5-a8a90f4faa3f
2. Balodis, E. (1934). Kooperācija [Cooperation]. Rīga, Latvia: Latvijas kooperatīvu izdevniecības savienības apgādībā.
3. Bednarz, J. B., & Markiewicz, M. M. (2015). From confrontation to cooperation – institutional support in building cooperation of Polish enterprises. Oeconomia Copernicana, 6(3), 89–115. doi: 10.12775/OeC.2015.023
4. Bekkum, O.V., & Bijman, J. (2006). Innovations in cooperative ownership: Converted and hybrid listed cooperatives. Business paper presented at the 7th International Conference on Management in Agri-Food Chains and Networks, Ede, The Netherlands, 1–15. Retrieved from https://www.researchgate.net/profile/Jos_Bijman/publication/40116089_Cooperatives_Going_Public_Motives_Ownership_and_Performance/links/59de065baca272204c2c7429/Cooperatives-Going-Public-Motives-Ownership-and-Performance.pdf
5. Borzaga, C., & Galera, G. (2012). Promoting the Understanding of Cooperatives for a better world. Summary, proceedings of “Promoting the Understanding of Cooperatives for a Better World” conference, March 15 and 16, , Venice Italy. September 28, Euricse. Retrieved from https://pdfs.semanticscholar.org/5f18/49517fda445cedba72c1803a7ceebc9b32aa.pdf