Hoa, H.T.T. et al. 2023. Analysis of technical efficiency’s lettuce farmers in Dalat City, Vietnam. HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ECONOMICS AND BUSINESS ADMINISTRATION. 14, 1 (Jun. 2023), 38–49. DOI:https://doi.org/10.46223/HCMCOUJS.econ.en.14.1.2419.2023.