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Schumann, Anja; Nigg, Claudio R.; Rossi, Joseph S.; Jordan, Patricia J.; Norman, Gregory J.; Garber, Carol Ewing; Riebe, Deborah; Benisovich, Sonya V. (2002). Construct Validity of the Stages of Change of Exercise Adoption for Different Intensities of Physical Activity in Four Samples of Differing Age Groups. American journal of health promotion, 16(5), pp. 280-287. Sage 10.4278/0890-1171-16.5.280
Jordan, Patricia J.; Nigg, Claudio R.; Norman, Gregory J.; Rossi, Joseph S.; Benisovich, Sonya V. (2002). Does the transtheoretical model need an attitude adjustment? Psychology of sport and exercise, 3(1), pp. 65-83. Elsevier Science 10.1016/S1469-0292(01)00005-X
Nigg, Claudio R.; Norman, Gregory J.; Rossi, Joseph S.; Benisovich, Sonya V. (2001). Examining the Structure of Physical Self-Description Using an American University Sample. Research Quarterly for Exercise and Sport, 72(1), pp. 78-83. Taylor & Francis 10.1080/02701367.2001.10608936
