Bell, R. C., L. M. P. Ceríaco, L. A. Scheinberg, and R. C. Drewes. 2022. Chapter 18. The amphibians of the Gulf of Guinea oceanic islands. Ceríaco, L. M. P., R. F. de Lima, M. Melo, and R. C. Bell eds., Biodiversity of the Gulf of Guinea Oceanic Island: Science and Conservation: 479–504 ( Berlin, Germany, Springer Nature.