Watson W (1768). An account of a series of experiments, instated with a view of ascertaining the most successful method of inoculating the smallpox. London: J Nourse.

Gregory J (1772). Lectures on the duties and qualifications of a physician. London: Strahan and Cadell.

Fordyce G (1802).  A second dissertation on fever. London: J Johnson.

Behring, Boer, Kossel H (1893). Zur Behandlung diphtheriekranker Menschen mit Diphtherieheilserum. Deutsche Medicinische Wochenschrift 17:389-393.