Traoré, M. S.; Ouattara, Y.; Doumbouya , M.; Bonsson, B.; Kéli, Z. J. 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. 2020, 4, 009-016.