Barki, W. H., M. F. Ullah, M. Zubair, and M. Tahir. “Effects of Benzalkonium Chloride on the Microanatomy of Corneal Stroma”. Annals of Punjab Medical College, Vol. 8, no. 1, June 2014, pp. 11-15, doi:10.29054/apmc/2014.371.