Alfredo Cuzzocrea, Sergio Greco, Henrik Legind Larsen, Domenico Saccà, Troels Andreasen, Henning Christiansen <br/><br/>
Flexible Query Answering Systems 

 -  Springer  Springer  2019 
<br/><br/><label>ISBN: </label>9783030276294 
<br/><br/><label>Source: </label>EBOOK