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Paxton, Raheem J.; Motl, Robert W.; Aylward, Alison; Nigg, Claudio R. (2010). Physical Activity and Quality of Life—The Complementary Influence of Self-Efficacy for Physical Activity and Mental Health Difficulties. International journal of behavioral medicine, 17(4), pp. 255-263. Springer 10.1007/s12529-010-9086-9
