Analysis of Polyphenolic Content and Antioxidant Activity of Four Dark Skin GrapesYanqiu Shen, Wanling Zhang, Xiaohan Wei, Guihong Zhou, Hui Xia and Dong LiangE3S Web Conf., 145 (2020) 01005DOI: https://doi.org/10.1051/e3sconf/202014501005