On this website, you will find information regarding the following requirements engineering textbooks.
by Klaus Pohl
English Edition
Springer-Verlag (2010)
by Klaus Pohl and Chris Rupp
2. English Edition
Rocky Nook Inc. (2015)
by Klaus Pohl
2. German Edition
dpunkt.Verlag GmbH (2008)
by Klaus Pohl and Chris Rupp
4. German Edition
dpunkt.verlag GmbH (2015)