Coco, Orazio (24 April 2019). "Italian diplomacy in China: the forgotten affair of Sān Mén Xiàn (1898–1899)". Journal of Modern Italian Studies. 24 (2): 328–349. doi:10.1080/1354571X.2019.1576416. S2CID150961616.
Coco, Orazio (22 May 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.
Coco, Orazio (24 April 2019). "Italian diplomacy in China: the forgotten affair of Sān Mén Xiàn (1898–1899)". Journal of Modern Italian Studies. 24 (2): 328–349. doi:10.1080/1354571X.2019.1576416. S2CID150961616.
Coco, Orazio (22 May 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.