@article{GeisselKraemlingPaulus2019,
  author    = {Brigitte Geißel and Anna Kr{\"a}mling and Lars Paulus},
  title     = {It depends…different direct democratic instruments and equality in Europe from 1990 to 2015},
  journal   = {Politics and Governance},
  volume    = {7},
  number    = {2},
  pages     = {365 -- 379},
  doi       = {10.17645/pag.v7i2.1881},
  year      = {2019},
}