@article{escidoc:2417751,
  title = {Measurement of second-order response without perturbation},
  journal = {EPL},
  volume = {116},
  number = {6},
  publisher = {IOP Publishing},
  address = {Bristol},
  year = {2017},
  slug = {escidoc-2417751},
  author = {Helden, Laurent and Basu, Urna and Kr\"uger, Matthias and Bechinger, Clemens}
}