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2. Queirós, A., Silva, A., Alvarelhão, J., Rocha, N.P., Teixeira, A.: Usability, accessibility and ambient-assisted living: a systematic literature review. Univ. Access Inf. Soc. 14(1), 57–66 (2013)
3. ISO 9241: Ergonomics of Human-System Interaction, Genève (2009)
4. ISO 9241-171: Ergonomics of Human-System Interaction – Part 171: Guidance on Software Accessibility (2008)
5. Hanington, B., Martin, B.: Universal Methods of Design: 100 Ways to Research Complex Problems, Develop Innovative Ideas, and Design Effective Solutions. Rockport Publishers, Beverly (2012)