Kollmann, Tobias R.; Dobson, Simon (2011-01-01), Remington, Jack S.; Klein, Jerome O.; Wilson, Christopher B.; Nizet, Victor (eds.), "Chapter 16 - Syphilis", Infectious Diseases of the Fetus and Newborn (Seventh Edition), Philadelphia: W.B. Saunders, pp. 524–563, doi:10.1016/b978-1-4160-6400-8.00016-x, ISBN978-1-4160-6400-8, retrieved 2024-12-07
Kollmann, Tobias R.; Dobson, Simon (2011-01-01), Remington, Jack S.; Klein, Jerome O.; Wilson, Christopher B.; Nizet, Victor (eds.), "Chapter 16 - Syphilis", Infectious Diseases of the Fetus and Newborn (Seventh Edition), Philadelphia: W.B. Saunders, pp. 524–563, doi:10.1016/b978-1-4160-6400-8.00016-x, ISBN978-1-4160-6400-8, retrieved 2024-12-07