Maurice Boffa, Paolo Casalegno. The Consistency of Some 4-Stratified Subsystem of NF Including NF::3::. Journal of Symbolic Logic, 50(2):407-411, 1985.
@article{BoffaC85, title = {The Consistency of Some 4-Stratified Subsystem of NF Including NF::3::}, author = {Maurice Boffa and Paolo Casalegno}, year = {1985}, tags = {consistency}, researchr = {https://researchr.org/publication/BoffaC85}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {50}, number = {2}, pages = {407-411}, }