CNRS

Professor of African Studies (retired), University of Cologne

Professor of African Studies, University of Helsinki

University of Hradec Králové/Institute of Ethnology, Czech Academy of Science

Professor of Anthropology, Vassar College

Professor of Linguistics, University of Calabar

Assistant Professor of Linguistics, Universitas Sumatera Utara, INDONESIA

Researcher African Studies Centre Leiden

Research Associate Professor, University at Buffalo, The State University of New York

Professor Emerita of English, Grand Valley State University