@misc{indiciaeef6414e5245e,
  title = {Stereoscopic depth but not shape perception from second-order stimuli.},
  author = {L R Ziegler and R F Hess},
  year = {1999},
  doi = {10.1016/s0042-6989(98)00224-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/10343817/},
  note = {Source identifier: 10343817}
}