1. ISO/IEC 26550 (2013): Software and systemsengineering -- Reference model for product line engineering and management. ISO/IEC 26550 (2013): Software and systemsengineering -- Reference model for product line engineering and management.
2. Carnegie Mellon University - Software Engineering Institute. Product Line Hall of Fame. http://splc.net/fame.html 2013. last visited 2015-01-27. Carnegie Mellon University - Software Engineering Institute. Product Line Hall of Fame. http://splc.net/fame.html 2013. last visited 2015-01-27.
3. Apel S. Batory D. Kaestner C. Saake G. 2013: Feature-Oriented Software Product Lines -- Concepts and Implementation Springer ISBN 978-3-642-37521-7 Apel S. Batory D. Kaestner C. Saake G. 2013: Feature-Oriented Software Product Lines -- Concepts and Implementation Springer ISBN 978-3-642-37521-7
4. Pure::Systems pure::variants http://www.pure-systems.com/ last visited 2015-01-25. Pure::Systems pure::variants http://www.pure-systems.com/ last visited 2015-01-25.