Wolf, J., Kleinert, J., & Wasserkampf, A. (2019). Motivation in German physical education: Do boys like being ego orientated? In B. Strauss, B. Halberschmidt, T. Utesch, D. Dreiskämper, S. Brückner, M. Tietjens, . . . L. Busch (Eds.), Building the future of sport and exercise psychology. Abstract book (p. 288). Münster: Stelljes. Abstract.