Guantao Yang, Zhizhe Liu, Qi Xiong, Zepeng Lu, Xiao Yang, Shen Zhou, Di Zhang, Shang‐Da Jiang, Dahui Zhao. "Stabilizing Indeno[1,2‐
                    <i>a</i>
                    ]Fluorene: The Only Ferromagnetic Diradical of Indenofluorene Isomers." Angewandte Chemie International Edition, 2026. doi:10.1002/anie.8243188