APA
Troels Andreasen R. R. Y. H. B. H. C. H. L. L., . (2009). Flexible Query Answering Systems. Germany: Springer.
Chicago
Troels Andreasen Ronald R Yager Henrik Bulskov Henning Christiansen Henrik Legind Larsen, . 2009. Flexible Query Answering Systems. Germany: Springer.
Harvard
Troels Andreasen R. R. Y. H. B. H. C. H. L. L., . (2009). Flexible Query Answering Systems. Germany: Springer.
MLA
Troels Andreasen Ronald R Yager Henrik Bulskov Henning Christiansen Henrik Legind Larsen, . Flexible Query Answering Systems. Germany: Springer. 2009.