@article{Stecker2011,
  author    = {Christian Stecker},
  title     = {Determinants of party unity a comparative analysis of the german state parliaments},
  journal   = {Politische Vierteljahresschrift : Zeitschrift der Deutschen Vereinigung f{\"u}r Politische Wissenschaft},
  volume    = {52},
  number    = {3},
  pages     = {424 -- 447},
  year      = {2011},
}