1. Ackerson, R. C., & Hebert, R. R. (1981). Osmoregulation in cotton in response to water stress. I. Alteration in photosynthesis, leaf conductance, translocation and ultra structure. Plant Physiology, 67, 484–488.
2. Alvim, P. (1988). Relationship between climatic factors and cocoa yield. In Proceedings of the 10th international cocoa research conference Santo Domingo, Dominican Republic. pp. 159–167.
3. Alvim, P. T., & Alvim, R. (1978). Relation of climate to growth periodicity in tropical trees. In P. B. Tomlinson & M. H. Zimmermann (Eds.), Tropical trees as living systems (pp. 445–464). Cambridge: Cambridge University Press.
4. Apshara, S. E., Rajesh, M. K., & Balasimha, D. (2013). Assessment of morphological, physiological and molecular characteristics of cocoa accessions from Central and South America in relation to drought tolerance. Journal of Plantation Crops, 41(3), 389–397.
5. Balasimha, D., Anil Kumar, V., & Ananda, K. S. (2008). Photosynthetic characteristics and yield in cocoa hybrids. Journal of Plantation Crops, 36(1), 8–11.