Gabriel Uzquiano. Models of second-order Zermelo set theory. Bulletin of Symbolic Logic, 5(3):289-302, 1999. [doi]
@article{Uzquiano99, title = {Models of second-order Zermelo set theory}, author = {Gabriel Uzquiano}, year = {1999}, url = {http://www.math.ucla.edu/~asl/bsl/0503/0503-001.ps}, researchr = {https://researchr.org/publication/Uzquiano99}, cites = {0}, citedby = {0}, journal = {Bulletin of Symbolic Logic}, volume = {5}, number = {3}, pages = {289-302}, }