Using Level-2 Fuzzy Sets to Combine Uncertainty and Imprecision in Fuzzy Regions

@inproceedings{Verstraete2011UsingLF,
  title={Using Level-2 Fuzzy Sets to Combine Uncertainty and Imprecision in Fuzzy Regions},
  author={J{\"o}rg Verstraete},
  booktitle={AWIC},
  year={2011}
}