Mahmud, Maksuda Bintey, et al. “Does Vitamin D3 Supplementation Affect Antioxidant Enzymes of D3 Deficient Patients With Asthma COPD Overlap (ACO)? - A Randomized Controlled Trial”. Journal of Bangladesh Society of Physiologist, vol. 14, no. 2, Jan. 2020, pp. 89-98, doi:10.3329/jbsp.v14i2.44790.