Opilski, Zbigniew, Marcin Procek, Salvador Aznar-Cervantes, Jose Cenis, and Xavier Munoz. “Fiber Optic Humidity Sensor Based on Silk Fibroin Interference Films”. Photonics Letters of Poland 12, no. 2 (July 1, 2020): 49–51. Accessed July 13, 2024. https://www.photonics.pl/PLP/index.php/letters/article/view/12-17.