Henning Christiansen, Hélène Jaudoin, Panagiotis Chountas, Troels Andreasen, Henrik Legind Larsen <br/><br/>
Flexible Query Answering Systems 

 -  Springer  Springer  2017 
<br/><br/><label>ISBN: </label>9783319596921 
<br/><br/><label>Source: </label>EBOOK