Chitchanok, Anutrakulchai, Phloysungwarn Rattasaritt, Senamontri Suthatip, Phimwapi Suphaporn, Piadang Nattayana, and Trongpanich Yanee. 2017. “Improvement of Vitamin B6 Production from Rhizobium Sp. 6-1c1 by Random Mutation”. Asia-Pacific Journal of Science and Technology 16 (8):911-18. https://so01.tci-thaijo.org/index.php/APST/article/view/83613.