Gut, Kazimierz, and Zbigniew Opilski. “Broad-Band Difference Interferometer As a Temperature Sensor”. Photonics Letters of Poland 6, no. 4 (December 31, 2014): pp. 121–123. Accessed April 24, 2024. https://www.photonics.pl/PLP/index.php/letters/article/view/6-43.