American Men & Women of Science : A Biographical Directory of Today’s Leaders in Physical, Biological and Related Sciences: DUR-GAK. 2022, p3702-3703.
American Men & Women of Science : A Biographical Directory of Today’s Leaders in Physical, Biological and Related Sciences: DUR-GAK. 2021, p3685-3685.
Africa Spectrum, 50, 3, 154-156, Akyeampong, Emmanuel Kwaku, Bates, Robert H., Nunn, Nathan, Robinson, James A., 2014, Africa's development in historical perspective, Cambridge, Cambridge Univ. Press, 978-1-107-04115-8