@article{IM2_2021_85_6_a5,
     author = {V. G. Kanovei and V. A. Lyubetsky},
     title = {Models of set theory in which the separation theorem fails},
     journal = {Izvestiya. Mathematics},
     pages = {1181--1219},
     year = {2021},
     volume = {85},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2021_85_6_a5/}
}