@misc{W2105234323,
  author = {N.N. Karnik and Jerry M. Mendel and Qi‐Lian Liang},
  title = {Type-2 fuzzy logic systems},
  year = {1999},
  howpublished = {IEEE Transactions on Fuzzy Systems},
  doi = {https://doi.org/10.1109/91.811231}
}