TY  - DATA
AU  - Troels Andreasen, Henning Christiansen, Henrik L. Larsen
TI  - Flexible Query Answering Systems
SN  - 9783540496557
PY  - 1998///
PB  - Springer Berlin Heidelberg
KW  - Computer Science
UR  - https://doi.org/10.1007/BFb0055986
ER  -