Binarity and multiperiodicity in high-amplitude delta Scuti stars
  We present our first results for a sample of southern high-amplitude delta Scuti stars (HADS), based on a spectrophotometric survey started in 2003. For CY Aqr and AD CMi, we found very stable light and radial velocity curves; we confirmed the double-mode nature of ZZ Mic, BQ Ind and RY Lep. Finally, we detected gamma-velocity changes in RS Gru and RY Lep 
A. Derekas, L.L. Kiss, B. Csak, J. Griffin, C. Lindstrom, Sz.   Meszaros, P. Szekely, M.C.B. Ashley, T.R. Bedding