RESTALL, Greg. Fixed-Point Models for Theories of Properties and Classes. The Australasian Journal of Logic, [S.l.], v. 14, n. 1, apr. 2017. ISSN 1448-5052. Available at: <https://ojs.victoria.ac.nz/ajl/article/view/4032>. Date accessed: 21 june 2019. doi: https://doi.org/10.26686/ajl.v14i1.4032.