Franco-Crespo, Christian, Jos Sumpsi, and Sandra Balde. “Food Sustainability and Market Imperfections in Small-Scale Andean Farms”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 34, no. 1 (June 11, 2017): 64–80. Accessed May 5, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7496.