BERGOEING, J. P. ., C. D. . MONACHON, B. MOUGENOT, D. . CAILLEAU, and I. . OUSSEINI. “ Níger”. Revista De Geografía Norte Grande, no. 22, Oct. 2021, pp. 67-75, https://revistahistoria.uc.cl/index.php/RGNG/article/view/41995.