... https://www.qs.com/rankings/ (accessed on 20 September 2019). 23. Center for World University Rankings (CWUR). Available online: https://cwur.org ... validator.w3.org/docs/why.html (accessed on 17 September 2019). 30. W3C's Markup Validation ...
... w3.org/WAI/ER/tools/ which cannot be covered here. When reviewing tools you will discover that while many are free ... https://doi.org/10.1007/978-1-4842-4881-2_6 1https://validator.w3.org/. 2https://validator.w3.org/nu/about.html ...
... https://doi.org/10.1016/J.GIQ.2006.03.002 Kobau, R., Zahran, H., Thurman, D. J., Zack, M. M., Henry, T. R. ... w3.org/css- validator/ W3C. (2013). The W3C markup validation service. Retrieved March 27, 2018, from http://validator.w3.org ...
... validator.w3.org/checklink. To start your free online link check, follow these steps: 1. Go to http://validator.w3.org/checklink. This takes you to the W3C Link Checker utility. 2. In the text box, enter the full URL of the page you ...