%0 Conference Paper %K Software Product Lines %K Software Evolution %B Proceedings of the 23rd International Systems and Software Product Line Conference, SPLC 2019, Volume B, Paris, France, September 9-13, 2019 %D 2019 %I ACM %P 1-69 %R 10.1145/3307630.3342414 %T Towards efficient analysis of variation in time and space %U https://doi.org/10.1145/3307630.3342414