M. Abdul Aziz, W. A. R. Wan Mohd Isa, and N. S. Mohd Fadzir, “Accessibility of Websites for People with Disabilities (PWD) in Malaysia: An Empirical Investigation”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 1, no. 2, pp. 221–226, Apr. 2011.