
http://www.cesifo-group.de/ifoHome/publications/working-papers/CESifoWP/CESifoWPdetails?wp_num=6430&CESifoWP.search=+

http://www.cer.org.uk/sites/default/files/pb_eurasian_IB_16.3.17_0.pdf

https://www.africantraderemedies.com/opinions/the-squeeze-can-trade-law-preserve-the-juice-in-south-africas-citrus-fruits/