Detections of inflowing gas from narrow absorption lines at parsec scales Zhi-Fu Chen, Minfeng Gu, Zhicheng He, Defu Bu, Fulai Guo, Qiusheng Gu and Yiping Qin A&A, 659 (2022) A103 Published online: 11 March 2022 DOI: 10.1051/0004-6361/202142307