Wassmer, Patrick, et al. “Geomorphology and Sedimentary Structures of Upper Pleistocene to Holocene Alluvium Within the Nyabarongo Valley (Rwanda). Palaeo-Climate and Palaeo-Environmental Implications”. Geografia Fisica E Dinamica Quaternaria, vol. 36, no. 1, June 2013, pp. 199-10, https://doi.org/10.4461/GFDQ.2013.36.17.