Niyomtham, Krittiya, Kisana Bhinija, and Pattana S. Huehne. 2018. “A Direct Gene Transferring System for Oncidium Orchids, a Difficult Crop for Genetic Transformation”. Agriculture and Natural Resources 52 (5). Bangkok, Thailand:424-29. https://li01.tci-thaijo.org/index.php/anres/article/view/231822.