text: 14.4 Books 
  DuCharme, Bob (2011). Learning SPARQL. O’Reilly Media 
  
  Lewis, Harry. (1997). Elements of the Theory of Computation. With Christos Papadimitriou. Prentice- 
  Hall; 2nd edition (August 7, 1997). ISBN-13: 978-0132624787 
  
  Segaran, Toby (2009). Programming the Semantic Web: Build Flexible Applications with Graph Data. 
  With Colin Evans and Jamie Taylor. O'Reilly Media; 1st edition (July 28, 2009). 
  
  14.5 Vendors 
  AllegroGraph Triplestore (Franz Inc.): https://franz.com/ 
  
  Amazon Neptune: https://aws.amazon.com/neptune/ 
  
  Docker: https://www.docker.com/ 
  
  Dynaccurate: https://www.dynaccurate.com/ 
  
  Ontotext: https://www.ontotext.com/ 
  
  Pool Party: https://www.poolparty.biz/ 
  
  Stardog: https://www.stardog.com/ 
  
  Top Quadrant: https://www.topquadrant.com/ 