Haotian Ni Tian-Zuo Wang Hong Tao Xiuqi Huang Chenping Hou Gradient-based causal discovery with latent variables. 46 2025 January 114 Mach. Learn. 2 https://doi.org/10.1007/s10994-024-06696-8 db/journals/ml/ml114.html#NiWTHH25 streams/journals/ml