TY  - JOUR
A1  - Bartels, Knut
T1  - Evaluation of online exercises with free text input
Y1  - 2003
SN  - 3-8322-1977-3
ER  - 
TY  - JOUR
A1  - Bartels, Knut
T1  - E-stat : automatic evaluation of online exercises
Y1  - 2002
ER  -