@article{10_4064_fm_49_1_1_10,
     author = {A. L\'evy},
     title = {Principles of reflection in axiomatic set theory},
     journal = {Fundamenta Mathematicae},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1960},
     doi = {10.4064/fm-49-1-1-10},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-49-1-1-10/}
}