@book{JustWeese1997,
  author    = {Just, Winfried and Weese, Martin},
  title     = {Discovering modern set theory : Bd. 2 Set-theoretic tools for every mathematician},
  series = {Graduate studies in mathematics},
  volume    = {18},
  journal   = {Graduate studies in mathematics},
  publisher = {American Mathematical Society},
  address   = {Providence, RI},
  pages     = {XIII, 224 S.},
  year      = {1997},
  language  = {en}
}
@book{JustWeese1995,
  author    = {Just, Winfried and Weese, Martin},
  title     = {Discovering modern set theory : Bd. 1 The basics},
  series = {Graduate studies in mathematics},
  volume    = {8},
  journal   = {Graduate studies in mathematics},
  publisher = {American Mathematical Society},
  address   = {Providence, RI},
  pages     = {XV, 210 S.},
  year      = {1995},
  language  = {en}
}