Envelope tomography of long-period variable stars - III. Line-doubling frequency among Mira starsR. Alvarez, A. Jorissen, B. Plez, D. Gillet, A. Fokin and M. DedeckerA&A, 379 1 (2001) 305-322DOI: https://doi.org/10.1051/0004-6361:20011261
