Olanya, Amos, et al. “Natural Radioactivity Levels and Radiogenic Heat Production in River Sediments from Gulu and Amuru Districts, Northern Uganda”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 70, no. 1, Aug. 2023, pp. 60-85, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/15917.