Vanichkul, K., S. Kosiyachinda, M. Kosittrakul, S. Ketsa, V. Vangnai, and P. T. Umpai. “Harvesting Indices of Strawberries in Thailand”. Agriculture and Natural Resources, vol. 18, no. 2, May 1984, pp. 92-98, https://li01.tci-thaijo.org/index.php/anres/article/view/240966.