Cuspy and fractured black hole shadows in a toy model with axisymmetryWei-Liang Qian, Songbai Chen, Cheng-Gang Shao, Bin Wang and Rui-Hong YueEur. Phys. J. C, 82 1 (2022) 91DOI: https://doi.org/10.1140/epjc/s10052-022-10033-5