Hamsina, H.; Hermawati, H.; Tang, M. .; Hasani , R. .; Anggraini, N. .; Safira, I. . Characterization of Fiber Optic Biosensors Based on Chitinase Immobilization on Chitosan Film-Tofu Solid Waste: Metal Ions Monitoring in Water. jppipa, pendidikan ipa, fisika, biologi, kimia 2023, 9, 2625-2631.