@article{11410,
  author = {Ludwig Oster},
  title = {The electrical conductivity in sunspot regions},
  year = {1968},
  journal = {Solar Physics},
  volume = {3},
  pages = {543-556},
  month = {Jan-04-1968},
  issn = {0038-0938},
  doi = {10.1007/BF00151936},
}