@article{ApelLengauerMoelleretal.2008,
  author    = {Sven Apel and Christian Lengauer and Bernhard M{\"o}ller and Christian K{\"a}stner},
  title     = {An algebra for features and feature composition},
  journal   = {Lecture Notes in Computer Science},
  volume    = {5140},
  pages     = {36 -- 50},
  doi       = {10.1007/978-3-540-79980-1_4},
  year      = {2008},
}