@article{Schertz2002,
  author    = {Reinhard Schertz},
  title     = {Weber´s class invariants revisited},
  journal   = {Journal de th{\´e}orie des nombres de Bordeaux},
  volume    = {14},
  pages     = {325 -- 343},
  doi       = {10.5802/jtnb.361},
  year      = {2002},
}