Evidence of electron interaction with an unidentified bosonic mode in superconductor CsCa2Fe4As4F2 oleh Peng Li, Sen Liao, Zhicheng Wang, Huaxun Li, Shiwu Su, Jiakang Zhang, Ziyuan Chen, Zhicheng Jiang, Zhengtai Liu, Lexian Yang, Linwei Huai, Junfeng He, Shengtao Cui, Zhe Sun, Yajun Yan, Guanghan Cao, Dawei Shen, Juan Jiang, Donglai Feng