Optimisation of the production of a selenium-enriched polysaccharide from Cordyceps cicadae S1 and its structure and antioxidant activity oleh Wanwan Zhuansun, Jun Xu, Hengzhao Liu, Ying Zhao, Lulu Chen, Shufang Shan, Shiqin Song, Shiqin Song, Haoyu Zhang, Tingting Dong, Huawei Zeng, Qinxiang Xu