@article{swartz2021topology,
  title={Topology optimization of 3D photonic crystals with complete bandgaps},
  author={Swartz, Kenneth E and White, Daniel A and Tortorelli, Daniel A and James, Kai A},
  journal={Optics Express},
  volume={29},
  number={14},
  pages={22170--22191},
  year={2021},
  publisher={Optical Society of America}
}