@article{StreitWolfart2005,
  author    = {Manfred Streit and J{\"u}rgen Wolfart},
  title     = {Galois actions on some series of Riemann surfaces with many automorphisms},
  volume    = {13},
  pages     = {49 -- 81},
  url       = {http://www.math.uni-frankfurt.de/~wolfart/wolfart.html},
  year      = {2005},
}