TY  - JOUR
A1  - Elbe, Anne-Marie
A1  - Beckmann, Jürgen
A1  - Szymanski, Birgit
T1  - The Dropout Phenomenon at elite sport schools : a problem of self-regulation
Y1  - 2003
SN  - 84- 9772-095-4
ER  - 
TY  - JOUR
A1  - Kellmann, Michael
A1  - Beckmann, Jürgen
T1  - Research and intervention in sport psychology : new perspectives for an inherent conflict
Y1  - 2003
ER  - 
TY  - JOUR
A1  - Beckmann, Jürgen
A1  - Kellmann, Michael
T1  - Procedures and principles of sportpsychological assessment
Y1  - 2003
ER  -