Berrougui, H.; Marhuenda, E.; Haddad, W.; Hmamouchi, M.; Khalil, A.; El-Bouadili, A.; Herrera, M. D. Comparative Study on the Vasorelaxant Effects of Three Alkaloids-Rich Extracts from Seeds of <I>Peganum harmala</I> L. JNR 2012, 12, 87-91.