@inbook{4492,
  author = {Douglas Gough},
  title = {Open Questions},
  year = {1990},
  volume = {159},
  number = {Astrophysics and Space Science Library},
  pages = {451-475},
  publisher = {Springer Netherlands},
  address = {Dordrecht},
  issn = {0067-0057},
  isbn = {978-94-010-6730-0},
  doi = {10.1007/978-94-009-0541-2_37},
}