Licenciate Thesis, University of Jyväskylä. School of Business and Economics. Nro 128/2001.
ISBN: 951-39-1142-X
ISSN: 1457-036X
https://jyx.jyu.fi/handle/123456789/13113 (only the abstract in available in English)
Physical, Mental and Social Work Ability of Entrepreneurs (2001)