Dar, Nasser Rashid, et al. “EXUBERANT ULCERATED LESIONS OF SECONDARY SYPHILIS ON THE PALMS - AN UNUSUAL PRESENTATION”. Journal of Ayub Medical College Abbottabad, vol. 18, no. 2, Apr. 2006, pp. 80-81, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/4993.