@article{BlomeMashhoon2010,
  author    = {Hans-Joachim Blome and B. Mashhoon},
  title     = {Quasi-normal oscillations of a Schwarzschild black hole},
  journal   = {Physics Letters A. 100 (1984), H. 5},
  pages     = {231 -- 234},
  year      = {2010},
}