On the origin of high Doppler velocity wings in the spectra of O-rich AGB stars Do Thi Hoai, Pham Tuyet Nhung, Pham Tuan-Anh, Pierre Darriulat, Pham Ngoc Diep, Nguyen Thi Phuong and Tran Thi Thai EPJ Web Conf., 240 (2020) 05001 Published online: 21 August 2020 DOI: 10.1051/epjconf/202024005001