Shahzad, A.; Mohd Nawi, N.; Sutoyo, E.; Naeem, M.; Ullah, A.; Naqeeb, S.; Aamir, M. Search Engine Optimization Techniques for Malaysian University Websites: A Comparative Analysis on Google and Bing Search Engine. Int. J. Adv. Sci. Eng. Inf. Technol. 2018, 8, 1262-1269.