Open Access
@article{122092,
  author       = {Gruber, Eduard},
  title        = {{Experimentelle Untersuchungen über die Helligkeit 
                   der Farben}},
  journal      = {Philosophische Studien},
  year         = 1893,
  volume       = 9,
  pages        = {429-446},
  language     = {de},
  url          = {https://vlp-new.ur.de/records/lit4238}
}
