Revisiting the cosmic distance duality relation with machine learning reconstruction methods: the combination of HII galaxies and ultra-compact radio quasarsTonghua Liu, Shuo Cao, Sixuan Zhang, Xiaolong Gong, Wuzheng Guo and Chenfa ZhengEur. Phys. J. C, 81 10 (2021) 903DOI: https://doi.org/10.1140/epjc/s10052-021-09713-5