@article{Epstein2010,
  author    = {Paul Epstein},
  title     = {{\"U}ber M{\"o}biuskettenbr{\"u}che und Elementarkettenbr{\"u}che},
  journal   = {Mathematische Zeitschrift},
  volume    = {2},
  pages     = {412 -- 432},
  year      = {2010},
}