Kothsompong, H. “Purple Urine Bag Syndrome in a Paraplegic Woman with a Long-Term Indwelling Catheter and Asymptomatic Urinary Tract Infection: A Case Report”. ASEAN Journal of Rehabilitation Medicine, vol. 31, no. 3, Oct. 2021, pp. 119-22, https://he01.tci-thaijo.org/index.php/aseanjrm/article/view/243829.