@article{Euler2007,
  author    = {Leonhard Euler},
  title     = {Sur la lumi{\`e}re et les couleurs},
  url       = {http://edoc.bbaw.de/oa/series/reG8mOuuW8WIc/PDF/23yZ4hCkIzVa2.pdf},
  year      = {2007},
}