Ramadan, A., Sabir, J. S. M., Alakilli, S. Y. M., Shokry, A. M., Gadalla, N. O., Edris, S., et al. (2014). Metabolomic Response of Calotropis procera Growing in the Desert to Changes in Water Availability. PLoS One, 9(2): e87895. doi:10.1371/journal.pone.0087895.