By Koehn Stefan   in European Journal of Sport Science

ISSN:1746-1391|13|5|543-550

Taylor & Francis Ltd‎(2013)‎

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By Happell Brenda   Koehn Stefan   in Issues in Mental Health Nursing

ISSN:1096-4673|32|7|449-456

Informa Healthcare‎(2011)‎

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By Koehn Stefan   Morris Tony   Watt Anthony P.   in Journal of Applied Sport Psychology

ISSN:1041-3200|25|3|354-369

Routledge Ltd‎(2013)‎

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