C. Franco-Crespo, J. Sumpsi, and S. Balde, “Food Sustainability and Market Imperfections in Small-Scale Andean Farms”, IJSBAR, vol. 34, no. 1, pp. 64–80, Jun. 2017, Accessed: Sep. 18, 2025. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/7496