Pulsation in the atmosphere of the roAp star HD 24712 - I. Spectroscopic observations and radial velocity measurements
T. Ryabchikova, M. Sachkov, W. W. Weiss, T. Kallinger, O. Kochukhov, S. Bagnulo, I. Ilyin, J. D. Landstreet, F. Leone, G. Lo Curto, T. Lüftinger, D. Lyashko and A. Magazzù
