Optical Fiber Ball Resonator Sensor Spectral Interrogation through Undersampled KLT: Application to Refractive Index Sensing and Cancer Biomarker Biosensing. - Daniele Tosi; Zhannat Ashikbayeva; Aliya Bekmurzayeva; Zhuldyz Myrkhiyeva; Aida Rakhimbekova; Takhmina Ayupova; Madina Shaimerdenova (Sensors, 2021)