Jassim, E. H. . and Ameen, S. K. M. . (2014) “Effect of sucrose and mannitol on Ajmalicine production from leaves induced callus of Catharanthus roseus L. G. Don in vitro”, Journal of Biotechnology Research Center, 8(2), pp. 27–34. doi: 10.24126/jobrc.2014.8.2.323.