TY  - JOUR
A1  - Schiefele, Ulrich
T1  - Motivation
Y1  - 2009
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/30593
UR  - http://www.springerlink.com/content/x53x82/
SN  - 978- 3-540-88572 (print)
ER  -