S. A. Ferdoucy, M. A. H. Mian, N. Akhter, M. S. Alam, and M. Sadek, “Correlation between Degenerative Changes and Osteoporosis in Lumbar Spine of Elderly Women in Dhaka city, Bangladesh”, City Dent Coll J, vol. 10, no. 1, pp. 18–21, Feb. 2018.