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    Chapter and Conference Paper

    The Link between Barium Stars and Optically Bright Post-AGB Binaries

    Systematic radial velocity monitoring programs revealed that all optically bright, high-latitude post-AGB stars that show a near-IR excess in their energy distribution are binaries (see the contribution of R. ...

    Hans Van Winckel, Christoffel Waelkens, Alain Jorissen, Sophie Van Eck in Planetary Nebulae (1997)