1. Kurt, S.: The accessibility of university web sites: the case of Turkish universities. Univ. Access Inf. Soc. (2011). doi: 10.1007/s10209-010-0190-z
2. May, S., Zhu, Q.: A web accessibility assessment on the Texas public school system. Univ. Access Inf. Soc. (2010). doi: 10.1007/s10209-009-0153-4
3. Rømen, D., Svanæs, D.: Validating WCAG versions 1.0 and 2.0 through usability testing with disabled users. Univ. Access Inf. Soc. (2010). doi: 10.1007/s10209-011-0259-3
4. Buzzi, M., Leporini, B.: Accessing e-learning systems via screen reader: an example. Int. Conf. Hum. Comp. Interact. (2009). doi: 10.1007/978-3-642-02583-9_3
5. Iglesias, A., Moreno, L., Martínez, P., Calvo-Martin, R.: Evaluating the accessibility of three open-source learning content management systems: a comparative study. Comp. Appl. Eng. Educ. (2011). doi: 10.1002/cae.20557