Health related quality of life in people with multiple sclerosis : the role of coping, social participation and self-esteem : PhD thesis / Pavol Mikula.    Groningen : Rijksuniversiteit, [2014] . 121 strana
http://www.rug.nl/research/portal/publications/health-related-quality-of-life-in-people-with-multiple-sclerosis%2898348981-f62e-438f-b695-05ec37e48092%29.html