Philip M Wilson

Exercise motivation: a cross-sectional analysis examining its relationships with frequency, intensity, and duration of exercise

C. Hall, L. Duncan, O. Jenny, 2010, The international journal of behavioral nutrition and physical activity.

Distinguishing Perceived Competence and Self-Efficacy: An Example From Exercise

D. Markland, W. Rodgers, David Markland, 2014, Research quarterly for exercise and sport.