Mace R.; Universal Design: Housing for the Lifespan of all People, the U.S. Department of Housing and Urban Development, The Center for Universal Design at North Carolina State University, 199810.1080/10400435.1998.10131957
In Europe EIDD – Design for All Europe 100% self financing a European organization should be mentioned, which covers the entire area both in theory and in practice for design for all from built-up areas and material products for communication, services, and systems design
Connell B.R., Jones M., Mace R., Mueller J., Mullick A., Ostroff E., Sanford J., Steinfeld E., Story M., Vanderheiden G.; The principles of Universal Design, The National Institute on Disability and Rehabilitation Research, U.S. Department of Education NC State University, The Center for Universal Design, 1997 http://www.ncsu.edu/project/design-projects/udi/center-for-universal-design/ron-mace/
This division was introduced on the basis of the principles of Universal Design, while a further specification of barriers, the author has based on its own observations
Apelt R., Crawford J., Hogan D.; Wayfinding design guidelines, Cooperative Research Centre for Construction Innovation, Icon.Net Pty Ltd, Brisbane, Qld, 2007, p.1
Muhlhausen J., Wayfinding is not signage: signage plays an important part of wayfinding, but there’s more. Signs of the Times. http://www.signweb.com/index.php/channel/6/id/1433/
Komar B.; Modern quality of the space of cooperative housing estate in view of the Sustainable Development principles. Case study, Wydawnictwo Politechniki Śląskiej, Gliwice 2014, p.227