Haec appellatio a Vicipaediano e lingua indigena in sermonem Latinum conversa est. Extra Vicipaediam huius locutionis testificatio vix inveniri potest.
Johannes Lukas, "The linguistic situation in the Lake Chad area in Central Africa" in Africa vol. 9 (1936) pp. 332–349.
Paul Newman, "Chadic classification and reconstructions" in Afroasiatic Linguistics vol. 5 no. 1 (1977) pp. 1–42.
Paul Newman, "Chado-Hamitic 'adieu': new thoughts on Chadic language classification" in Atti del Secondo Congresso Internazionale di Linguistica Camito-Semitica ed. Pelio Fronzaroli (Florentiae: Instituto de Linguistica e di Lingue Orientali, Università di Firenze, 1978) pp. 389–397.
Paul Newman, The Classification of Chadic within Afroasiatic Leiden: Universitaire Pers Leiden, 1980.
Paul Newman, Roxana Ma, "Comparative Chadic: phonology and lexicon" in Journal of African Languages vol. 5 (1966) pp. 218–251.
Russell Schuh, "Chadic overview" in Selected Comparative-Historical Afrasian Linguistic Studies in Memory of Igor M. Diakonoff ed. M. Lionel Bender, Gabor Takacs, David L. Appleyard (LINCOM Europa, 2003) pp. 55–60.