@article{Hrivnak:4772,
      author        = "Hrivnak, Bruce;   and Henson, Gary;   and Van de Steene,
                       Griet;   and Van Winckel, Hans;  and Hillwig, Todd;   and
                       Bremer, Matthew",
      title         = "{Variability in Post-AGB Stars: Pulsation in
                       Proto-Planetary Nebulae}",
      month         = "Dec",
      year          = "2019",
}