Chuanpis Aroonrungsikult, Sutavee Sukprakarn, Shoji Shigenaga, and Eiji Nawata, “Analysis of Endogenous Gibberellic Acid, Abscisic Acid and Ethylene in Cucumber Seed (Cucumis sativus L.)”, Agr. Nat. Resour., vol. 27, no. 5, pp. 21–26, Dec. 1993.