1. Adu-Amponah, Y.; Novak, F. J.; Afza, R.; Van Duren, M. Meristem-tip culture of cocoa (Theobroma cacao L.). Trop. Agric. (Trinidad) 69:268–271; 1992.
2. Amefia, Y. K.; Cilas, C.; Djiekpor, E. K.; Partiot, M. Vegetative propagation of the cocoa tree. The Cafe Cacao 29:83–88; 1985.
3. Bertrand, B.; Agbodjan, A. K. Propagation of cocoa by orthotropic cuttings. Initial results and prospects. The Cafe Cacao 33:147–156; 1989.
4. Bertrand, B.; Dupois, V. Contribution à la mise au point du clonage du cacaoyer (Theobroma cacao L.) par l'utilisation d'axes orthotropes. The Cafe Cacao 36;9–26; 1992.
5. Capelle, S. C.; Mok, D. W.; Kirchner, S. C. Effects of TDZ on cytokinin autonomy and the metabolism of N6-(σ2-isopentenyl)[8-14C]adenosine in callus tissues of Phaseolus lunatus. Plant Physiol. 73:796–802; 1983.