Hidayah, Nurul, and Bambang Purwono. “A Turn-off Fluorescent Chemosensor for Detecting Formaldehyde Based on Pyridine Derivative”. Al Kimiya: Jurnal Ilmu Kimia Dan Terapan, vol. 10, no. 2, Dec. 2023, pp. 107-13, doi:10.15575/ak.v10i2.25573.