1. Abels J (1975) The genera Ceratotheca Endl. and Dicerocaryum Boj. (Monographs of the African Pedaliaceae iii–iv). Memórias da Sociedade Broteriana 25:1–358. Coimbra
2. Abrahams RD, Szwed JF (1975) Discovering Afro-America. E. J. Brill Archive, Leiden
3. Adjanohoun EI, Ahyi AMR, Ake Assi L, Baniakina J, Chibon P, Cuset G, Doulou V, Enzanza A, Eyme J, Goudote E, Keita A, Mbemba C, Mollet J, Moutsamboté J.-M, Mpati J & Sita P (1988) Médecine traditionnelle et pharmacopée. Contribution aux etudes ethnobotaniques et floristiques en République populaire du Congo. Agence de coopération culturelle et technique, Paris, p 605
4. Almada AA (1594) Brief treatise on the rivers of Guinea. Part I. [Liverpool]: Department of History, University of Liverpool, 1984. http://digital.library.wisc.edu/1711.dl/AfricaFocus.Almada01
5. Alpern SB (2008) Exotic plants of Western Africa: where they came from and when. Hist Afr 35:63–102