A reflective microfiber biosensor for monitoring of trace flumequine residues enhanced by europium-incorporated covalent organic framework. - Guo, Shuyuan; Liu, Miao; Liu, Hanlin; Mao, Jingru; Zou, Yongfeng; Sun, Li-Peng; Huang, Yan; Sun, Dandan; Ma, Jie (Microchemical Journal, 2025)