@article{Maciejewski:1998,
  author  = "A. Maciejewski and H. PrÍtka",
  title   = "Galactic disc tidal action and observability of the Oort cloud comets",
  journal = "Astronomy & Astrophysics",
  number  = "no 336",
  pages   = "1065--1071",
  year    = "1998",
}