@article{PolyvyanyyGarciaBanuelosDumas2012,
  author    = {Artem Polyvyanyy and Luciano Garcia-Banuelos and Marlon Dumas},
  title     = {Structuring acyclic process models},
  journal   = {Information systems},
  volume    = {37},
  number    = {6},
  pages     = {518 -- 538},
  doi       = {10.1016/j.is.2011.10.005},
  year      = {2012},
}