Ansari, Rizwan Zafar, et al. “INCIDENCE OF PARAPHENYLENE-DIAMINE POISONING IN THREE DISTRICT HEADQUARTER HOSPITALS OF PAKISTAN”. Journal of Ayub Medical College Abbottabad, vol. 31, no. 4, Sept. 2019, pp. 544-7, https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/6245.