@article{Hinnion_2003, title={About the coexistence of “classical sets” with “non-classical” ones: A survey}, url={https://apcz.umk.pl/LLP/article/view/LLP.2003.004}, DOI={10.12775/LLP.2003.004}, abstractNote={This is a survey of some possible extensions of ZF to a larger universe, closer to the “naive set theory” (the universes discussed here concern, roughly speaking : stratified sets, partial sets, positive sets, paradoxical sets and double sets).}, number={11-12}, journal={Logic and Logical Philosophy}, author={Hinnion, Roland}, year={2003}, month={Nov.}, pages={79–90} }