@article{10_4064_fm_122_1_57_60,
     author = {Matt Kaufmann},
     title = {On expandability of models of arithmetic and set theory to models of weak second-order theories},
     journal = {Fundamenta Mathematicae},
     pages = {57--60},
     publisher = {mathdoc},
     volume = {122},
     number = {1},
     year = {1984},
     doi = {10.4064/fm-122-1-57-60},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-122-1-57-60/}
}