Gu du de wai lai zhe: da Qing hai guan zong shui wu si Hede, 2003.
His These from the land Sinim, 1901.
Lu, H.C. Ho-te chuan, 1986 p. 4 (Lu-pin Ho-te) p. 5 (Sir Robert Hart)
Robert Hart and China's early modernization, 1991 t.p. (Robert Hart and China's early modernization : his journals, 1863-1866)
Wikipedia, Feb. 13, 2014 (Sir Robert Hart, 1st Baronet, GCMG (20 February 1835-20 September 1911), was a British consular official in China, who served as the second Inspector-General of China's Imperial Maritime Custom Service (IMCS) from 1863 to 1911 ; born in Ulster, Ireland)