@article{HueffmeierWessolowskiSchmidtLoertzeretal.2014,
  author    = {J. H{\"u}ffmeier and K. Wessolowski and N. Schmidt-Loertzer and J. Bothin and A. van Randenborgh and G. Hertel},
  title     = {Social support from fellow group members triggers additional effort in groups.},
  journal   = {European Journal of Social Psychology.},
  volume    = {44},
  number    = {4},
  pages     = {287 -- 296},
  year      = {2014},
}