| Clue | Source | Date |
|---|---|---|
| Slalom path | New York Times | 03 Sep 2022 |
| Double curve | New York Times | 15 Oct 2021 |
| Ogee molding’s cross-section, e.g | Wall Street Journal | 06 Jul 2021 |
| Double curve | Newsday | 11 Aug 2019 |
| What a slalom path has | New York Times | 27 Jun 2018 |
| What a slalom path has | ||
| Double curve | Wall Street Journal | 09 Feb 2016 |
| Double curve | LA Times Daily | 30 Aug 2015 |
| Double curve | ||
| Double curve |