@article{Hrivnak:2694,
      author        = "Hrivnak, B. J. and  Lu, W. and  Van de Steene, G. and  Van
                       Winckel, H. and  Sperauskas, J. and  Bohlender, D.",
      title         = "{A Radial Velocity and Light Curve Study of Pulsations and
                       Binarity in Proto-Planetary Nebulae}",
      year          = "2015",
}