Archibald Norman Tucker
Nilo-Saharan Linguistics Colloquium (9th 2004 Jāmiʻat al-Kharṭūm. Maʻhad al-Dirāsāt al-Afrīqīyah wa-al-Āsiyawīyah)
Denis Creissels
Nilo-Saharan Linguistics Colloquium (1st 1980 Leiden, Netherlands)
Nilo-Saharan Linguistics Colloquium (12th 2015 University of Nairobi)
Christopher Ehret