Priyanath, Hunuwala Malawarage Suranjan, S.P. Premaratne, Amina Yoosuf, and D. Maurice. “Technical Efficiency for Tea Smallholder Farmers under UTZ Certification System in Sri Lanka: A Stochastic Frontier Approach”. SEISENSE Journal of Management 1, no. 2 (April 17, 2018): 1–19. Accessed November 16, 2025. https://journal.seisense.com/jom/article/view/9.