@article{EhrlenspielGrafKuehnetal.2011,
  author    = {Felix Ehrlenspiel and Karla Graf and Christian K{\"u}hn and Ralf Brand},
  title     = {Stability and variability of competitive anxiety},
  journal   = {Zeitschrift f{\"u}r Sportpsychologie},
  volume    = {18},
  number    = {1},
  pages     = {31 -- 43},
  doi       = {10.1026/1612-5010/a000034},
  year      = {2011},
}