T. Adejoh, H. C. Ezeh, M. E. Aronu, C. C. Nzotta, and S. O. Nwefuru, “A Technique for Appropriate Inferior Collimation in Chest Radiography of Asymptomatic Negroid Adults”, WAJR, vol. 24, no. 1, pp. 52–55, Aug. 2025, doi: 10.82235/wajr.vol24no1.361.