O. M. Abdel-Salam, N. A. Salem, M. El-Sayed El-Shamarka, N. Al-Said Ahmed, J. Seid Hussein, and Z. A. El-Khyat, “Cannabis-induced impairment of learning and memory: effect of different nootropic drugs”, EXCLI J., vol. 12, pp. 193–214, Mar. 2013.