Li, Xianfeng, Weijie Chen, Di Xie, Shicai Yang, Peng Yuan, Shiliang Pu, and Yueting Zhuang. 2021. “A Free Lunch for Unsupervised Domain Adaptive Object Detection Without Source Data”. Proceedings of the AAAI Conference on Artificial Intelligence 35 (10):8474-81. https://doi.org/10.1609/aaai.v35i10.17029.