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Mänty M. Early signs of mobility decline and physical activity counselling as a preventive intervention in older people. Studies in Sport, Physical Education and Health, nr 147, Jyväskylä, University of Jyväskylä. Dissertation. 2010. http://urn.fi/URN:ISBN:978-951-39-3882-6

Rantakokko M. Outdoor environment, mobility decline and quality of life among older people. Studies in Sport, Physical Education and Health, nr 168, Jyväskylä, University of Jyväskylä. Dissertation. 2011. http://urn.fi/URN:ISBN:978-951-39-4283-0

Pakkala I. Depressive symptoms, sense of coherence, physical activity and genetic factors among older people. Studies in Sport, Physical Education and Health, nr 178, Jyväskylä, University of Jyväskylä. Dissertation. 2012. http://urn.fi/URN:ISBN:978-951-39-4635-7