I am interested in old and new findings on the topic, especially as it relates to Yoruba and Urhobo languages.
Traore, M. & Natalia, S. (2016). Niger-Congo borrowings to English: Semantic changes and grammatical adaptation. Pyrex Journal of English and Literature. 2(2) pp. 12-22. http://www.pyrexjournals.org/pjel/pdf/2016/june/Traore-and-Natalia.pdf
Blench, R. Niger-Congo: Niger-Congo classification. Niger-Congo: an alternative view. http://rogerblench.info/Language/Niger-Congo/General/Niger-Congo%20an%20alternative%20view.pdf
Hyman, L.M. (2011). The Macro-Sudan Belt and Niger-Congo Reconstruction. Language Dynamics and Change 1, 3–49. http://www.linguistics.berkeley.edu/~hyman/papers/2011-hyman-macrosudan.pdf
http://www.cog.brown.edu/people/demuth/articles/2000DemuthBantuNounClasses.pdf
Longtau, S.R. An Exploration for Linguistic Evidence of Inter-Group Relations between Speakers of Tarok and other East Benue-Congo Languages in Prehistory. https://s3.amazonaws.com/academia.edu.documents/32979246/Intergroup_-_latest.pdf?AWSAccessKeyId=AKIAIWOWYYGZ2Y53UL3A&Expires=1516460506&Signature=qqeGalD%2Fi8RmK2ap0e4oqM8KXz4%3D&response-content-disposition=inline%3B%20filename%3DLinguistic_evidence_for_intergroup_relat.pdf
Comrie, B. (1987). The Worlds Major Languages. London Routledge. https://s3.amazonaws.com/academia.edu.documents/32571842/Comrie.2009.2nd_edition.the_worlds_major_languages.pdf?AWSAccessKeyId=AKIAIWOWYYGZ2Y53UL3A&Expires=1516460575&Signature=E56TVBCh%2FKwHvUndqf1jTQR6CPs%3D&response-content-disposition=inline%3B%20filename%3D32571842.pdf#page=900
Blench, R. An Outline Classification of the Mambiloid Languages. http://www.rogerblench.info/Language/Niger-Congo/Bantoid/Mambiloid/General/jwal-23-1-Blench.pdf
Grinvald, C. & Seifart, F. (2004). Noun classes in African and Amazonian languages: Towards a comparison. Linguistic Typology. 8, 243–285. file:///C:/Users/Computer123/Downloads/Noun_classes_in_African_and_Amazonian_la.pdf
Ehret, C. (1974). Some thoughts of the early history of the Congo-Nile watershed. https://cloudfront.escholarship.org/dist/prd/content/qt2gd85265/qt2gd85265.pdf
Blench, R. & Dendo, B. (1994). THE UKAAN LANGUAGE: BANTU IN SOUTH-WESTERN NIGERIA? http://rb.rowbory.co.uk/Language/Niger-Congo/VN/Ukaan/Blench%20Ukaan%20Analysis.pdf
Mous, M. (n.d.). LOSS OF LINGUISTIC DIVERSITY IN AFRICA. https://www.researchgate.net/profile/Maarten_Mous/publication/28640048_Loss_of_Linguistic_Diversity_in_Africa/links/541992730cf203f155ae027b.pdf
