@article{ZhangHoelzlKnapp2007,
  author    = {Gefei Zhang and Matthias H{\"o}lzl and Alexander Knapp},
  title     = {Enhancing UML state machines with aspects},
  journal   = {Lecture Notes in Computer Science},
  volume    = {4735},
  pages     = {529 -- 543},
  doi       = {10.1007/978-3-540-75209-7_36},
  year      = {2007},
}