@InProceedings{VaqueroISMM07,
  author = {Daniel Vaquero and Junior Barrera and Roberto {Hirata Jr.}},
  title = {An Entropy Minimization Approach for Designing {W}-Operators},
  booktitle = {Eighth International Symposium on Mathematical Morphology (ISMM'07)},
  address = {Rio de Janeiro, Brazil},
  month = {October},
  year = {2007}
}