Niyomtham, K., K. Bhinija, and P. S. Huehne. “A direct gene transferring system for Oncidium orchids, a difficult crop for genetic transformation”. Agriculture and Natural Resources, vol. 52, no. 5, Oct. 2018, pp. 424-9, https://li01.tci-thaijo.org/index.php/anres/article/view/231822.