Makhlouf Chaalal, Elena Gavilán, Hayette Louaileche, Diego Ruano, Juan Parrado, and Angélica Castaño. “Anti-Inflammatory Activity of Phenolic Extracts from Different Parts of Prickly Pear on Lipopolysaccharide-Stimulated N13 Microglial Cells”. International Journal of Phytomedicine, vol. 7, no. 4, Dec. 2015, pp. 411-9, https://ijp.arjournals.org/index.php/ijp/article/view/432.