-
Baecke, J.A.H., Burema, J., Frijtes, J.E.R. (1982). A short questionnaire for the measurement of habitual physical activity in epidemiological studies. The American Journal of Clinical Nutrition, 36, 936–942.
-
Berk, D.R., Hubert, H.B., Fries, J.F. (2006). Associations of changes in exercise level with subsequent disability among seniors: a 16-year longitudinal study. Journal of Gerontology Series A: Biological Science Medical Sciences, 61 (1), 97–102.
-
Blair, S.N. (2009). Physical inactivity: the biggest public health problem of the 21st century. British Journal of Sports Medicine, 43, 1–2.
-
Błędowski, P. (2012). Aging as a social problem. Prospects of demographic aging Polish 2035. In: M. Mossakowska, A. Więcek, P. Błędowski (eds.), Medical aspects, psychological, sociological and economic aging of the population in Poland. Poznań: Termedia Wydawnictwa Medyczne.
-
Bokovoy, J.L., Blair, S.N. (1994). Aging and exercise: A health perspective. Journal of American Planning Association, 2, 243–260.
-
Central Statistical Office (2013). Basic information about the demographic development of Poland up to 2013. Table 3: 17 (in Polish). Retrieved from: http://stat.gov.pl/cpr/rde/xbcr/gus/L podst inf o rozwoju dem pl do 2013 (12.10.213).
-
Clark, D.O. (1999). Identifying psychological, physiological, and environmental barriers and facilitators to exercise among older low income adults. Journal Clinical Geropsychology, 5, 51–62.
-
Clarke, L.H., Bennett, E.R. (2013). Constructing the moral body: Self-care among older adults with multiple chronic conditions. Health, 17 (3), 211–228.
-
Cohen-Mansfield, J., Marx, M.S., Guralnik, J.M. (2003). Motivators and barriers to exercise in an older community-dwelling population. Journal of American Planning Association, 11, 242–253.
-
Correlates of Self-Rated Successful Aging Among Community-Dwelling Older Adults. The American Journal of Geriatric Psychiatry, 14 (1), 43–51.