1. Illumination design problem: the unicorn’s horn;International Optical Design Conference 2023;2023-09-14
2. The 2021 IODC lens design problem: the down under lens;International Optical Design Conference 2021;2021-11-19
3. IODC 2021 illumination design problem: the curse of Prince Lambert;International Optical Design Conference 2021;2021-11-19
4. My thanks to IODC lens design problems;International Optical Design Conference 2017;2017-11-27
5. The 2017 IODC lens design problem: the centennial lens;International Optical Design Conference 2017;2017-11-27