1. The importance of supplier development for sustainability;Ağan,2018
2. AHDB Dairy. (2019). Cow numbers. Retrieved from https://dairy.ahdb.org.uk/market-information/farming-data/cow-numbers/uk-cow-numbers.
3. AHDB Dairy. (2019). Average UK milk yield. Retrieved from https://dairy.ahdb.org.uk/market-information/farming-data/milk-yield/average-milk-yield/.
4. A comparative literature analysis of definitions for green and sustainable supply chain management;Ahi;Journal of Cleaner Production,2013
5. Socially sustainable supply chain management and suppliers’ social performance: The role of social capital;Alghababsheh;Journal of Business Ethics, In Press.,2021