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Itidel, Chetoui; Chokri, Messaoud; Mohamed, Boussaid; Yosr, Zaouali . (2013). Antioxidant activity, total phenolic and flavonoid content variation among Tunisian natural populations of Rhus tripartita (Ucria) Grande and Rhus pentaphylla Desf.. Industrial Crops and Products, 51(), 171–177. doi:10.1016/j.indcrop.2013.09.002 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research