Ratanasthien, Kwanchai. “FOLIC ACID ANTAGONISTS (THE DIHYDROFOLATE REDUCTASE INHIBITORS): APPLICATION OF TETRAZOLIUM BIOAUTOGRAPHY ON DETERMINATION OF SERUM AND URINE METHOTREXATE”. Journal of Associated Medical Sciences 9, no. 2 (June 29, 2016): 107. Accessed May 19, 2024. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60842.