PyKale : Knowledge-Aware Machine Learning from Multiple Sources in Python - Lu, Haiping; Liu, Xianyuan; Zhou, Shuo; Turner, Robert; Bai, Peizhen; Koot, Raivo E.; Chasmai, Mustafa; Schobs, Lawrence; Xu, Hao (Proceedings of the 31st ACM International Conference on Information & Knowledge Management, 2022)