Mathias01'

@article{DBLP:journals/jsyml/Mathias01,
  author    = {A. R. D. Mathias},
  title     = {Slim Models of Zermelo Set Theory},
  journal   = {J. Symb. Log.},
  volume    = {66},
  number    = {2},
  year      = {2001},
  pages     = {487-496},
  ee        = {http://projecteuclid.org/euclid.jsl/1183746455},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}