@inbook{8818,
  author = {J. Neff and D. Neff},
  title = {Spectral images of the chromospheres of AR Lacertae},
  year = {1987},
  volume = {291},
  number = {Lecture Notes in Physics},
  pages = {531-535},
  publisher = {Springer Berlin Heidelberg},
  address = {Berlin, Heidelberg},
  isbn = {978-3-540-18653-3},
  doi = {10.1007/3-540-18653-0_194},
}