Blue and yellow long-period variables in the direction of the Small Magellanic Cloud.
R. E. Mennickent, L. Cidale, G. Pietrzyski, W. Gieren & B. Sabogal.
A&A, 457, 949, 2006.

Fe II emission lines in Be stars. I. Empirical diagnostic of circumstellar discs.
M. L. Arias, J. Zorec, L. Cidale, A. Ringuelet, N. Morrell & D. Ballereau.
A&A, 460, 821, 2006.