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Paxton, Raheem J.; Nigg, Claudio R; Motl, Robert W.; McGee, Kelly; McCurdy, Dana; Matthai, Caroline Horwath; Dishman, Rod K. (2008). Are Constructs of the Transtheoretical Model for Physical Activity Measured Equivalently Between Sexes, Age Groups, and Ethnicities? Annals of behavioral medicine, 35(3), pp. 308-318. Springer 10.1007/s12160-008-9035-x
