@article{VandeSteene:3899,
      author        = "Van de Steene, G. C. and Hrivnak, B. J. and Van Winckel,
                       H. and Sperauskas, J. and Bohlender, D.",
      title         = "{Spectroscopic and Photometric Variability of Three Oxygen
                       Rich Post-AGB “Shell” Objects}",
      year          = "2018",
}