@article{KoningHeemelsAdamMoller2023a,
  title         = {Gradient descent-based freeform optics design for illumination using algorithmic differentiable non-sequential ray tracing},
  issn          = {1573-2924},
  url           = {https://doi.org/10.1007/s11081-023-09841-9},
  doi           = {10.1007/s11081-023-09841-9},
  journal       = {Optimization and Engineering},
  publisher     = {Springer Science and Business Media LLC},
  author        = {Koning,  Bart de and Heemels,  Alexander and Adam,  Aurele and M\"{o}ller,  Matthias},
  year          = {2023},
  month         = sep
}