M. S. Traoré, Y. Ouattara, M. Doumbouya, B. Bonsson, and Z. J. Kéli, “Assessment of eight kola trees clones (Cola nitida (Vent.) Schott and Endl.) for their ability to cutting from terminal and sub-terminal branch”, GSC Adv. Res. Rev., vol. 4, no. 1, pp. 009–016, Jul. 2020.