Coco, Orazio (22 травня 2020). German Imperialism in China: the leasehold of Kiaochow Bay (1897–1914). The Chinese Historical Review. 26 (2): 156—174. doi:10.1080/1547402X.2020.1750231. S2CID219507116.
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Coco, Orazio (22 травня 2020). German Imperialism in China: the leasehold of Kiaochow Bay (1897–1914). The Chinese Historical Review. 26 (2): 156—174. doi:10.1080/1547402X.2020.1750231. S2CID219507116.