Nakarmi, S., S. Ahmed, M. A. Shahin, M. N. Shazzad, T. Mahmood, and S. A. Haq. “Co-Existence of Systemic Lupus Erythematosus and Ankylosing Spondylitis - A Case Report”. Bangladesh Medical Journal, vol. 46, no. 3, July 2019, pp. 100-3, doi:10.3329/bmj.v46i3.42251.