Extensive beam test study of prototype MRPCs for the T0 detector at the CSR external-target experiment. - Hu, Dongdong; Lu, Jiaming; Zhou, Jian; Deng, Peipei; Shao, Ming; Sun, Yongjie; Zhao, Lei; Chen, Hongfang; Li, Cheng; Tang, Zebo; Zhang, Yifei; Zhou, Yi; et al. (European Physical Journal C -- Particles & Fields, 2020)