@ARTICLE{Vilim2008Unary,
  author = {Vil\'{i}m, Petr},
  title = {Filtering algorithms for the unary resource constraint},
  journal = {Archives of Control Sciences},
  year = {2008},
  volume = {18},
  number = {2},
  address = {Institute of Automatic Control, Silesian University of Technology, Gliwice, Poland}
}