Suranant Subhadrabandhu, Pakorn Preechaburana, Supaluck Amloy, and Manu Fuangfoong. 2007. “The Measurement of Elastic Constants of Solids and Liquid by Using Line-Focus Transducer”. Agriculture and Natural Resources 41 (5). Bangkok, Thailand:186-91. https://li01.tci-thaijo.org/index.php/anres/article/view/244366.