Identity, Variables, and Impredicative Definitions

K. Jaakko, Jaakko Hintikka. Identity, Variables, and Impredicative Definitions. Journal of Symbolic Logic, 21(3):225-245, 1956.

@article{JaakkoH56,
  title = {Identity, Variables, and Impredicative Definitions},
  author = {K. Jaakko and Jaakko Hintikka},
  year = {1956},
  researchr = {https://researchr.org/publication/JaakkoH56},
  cites = {0},
  citedby = {0},
  journal = {Journal of Symbolic Logic},
  volume = {21},
  number = {3},
  pages = {225-245},
}