1. The History of Scurvy and Vitamin C;Carpenter,1986
2. Encyclopaedia Britannica (1815), Fifth Edition 13, 427–433
3. Encyclopaedia Britannica (1810), Fourth Edition 19, 62
4. Encyclopaedia Britannica (1842), Seventh Edition 20, 13
5. Encyclopaedia Britannica (1886), Ninth Edition 21, 562