1. Albrow, M.D., Cottrell, P.L.: Contribution functions and the depths of formation of spectral lines in Cepheids. MNRAS 278, 337 (1996)
2. Alvarez, R., Jorissen, A., Plez, B., Gillet, D., Fokin, A.: Envelope tomography of long-period variable stars. I. The Schwarzschild mechanism and the Balmer emission lines. A&A 362, 655–665 (2000)
3. Alvarez, R., Jorissen, A., Plez, B., Gillet, D., Fokin, A., Dedecker, M.: Envelope tomography of long-period variable stars II. Method. A&A 379, 288–304 (2001)
4. Alvarez, R., Jorissen, A., Plez, B., Gillet, D., Fokin, A., Dedecker, M.: Envelope tomography of long-period variable stars III. Line-doubling frequency among Mira stars. A&A 379, 305–322 (2001)
5. Baranne, A., Mayor, M., Poncet, J.L.: CORAVEL – a new tool for radial velocity measurements. Vistas Astron. 23, 279–316 (1979)