Kumar, C. U., P. V. Kishan, E. Chandrasekhar, and P. Usharani. “The Utility of Serial Serum Cholinesterase As a Prognostic Marker in Organophosphorus Compound Poisoning”. International Journal of Basic & Clinical Pharmacology, vol. 3, no. 3, Jan. 2017, pp. 529-33, https://www.ijbcp.com/index.php/ijbcp/article/view/1021.