Polyphenol contents and antioxidative activities of extracts from flowers of two Crataegus azarolus L. varities. - Bashri-Sahloul,R.; Ammar,S.; Fredj,R.B.; Saguem,S.; Grec,S.; Trotin,F.; Skhiri,F.H. (Pakistan J Biol Sci, 2009)