Gleichert, James E. (1971). "Étienne Joseph Jacquemin, Discoverer of 'Chadwick's Sign'". Journal of the History of Medicine and Allied Sciences. 26 (1): 75–80. doi:10.1093/jhmas/XXVI.1.75. PMID4925842.
Gleichert, James E. (1971). "Étienne Joseph Jacquemin, Discoverer of 'Chadwick's Sign'". Journal of the History of Medicine and Allied Sciences. 26 (1): 75–80. doi:10.1093/jhmas/XXVI.1.75. PMID4925842.