@article{PolyvyanyyWeidlichWeske2011,
  author    = {Artem Polyvyanyy and Matthias Weidlich and Mathias Weske},
  title     = {Connectivity of workflow nets the foundations of stepwise verification},
  journal   = {Acta informatica},
  volume    = {48},
  number    = {4},
  pages     = {213 -- 242},
  doi       = {10.1007/s00236-011-0137-8},
  year      = {2011},
}