@article{10_4064_fm_81_1_1_27,
     author = {Andrzej Zarach},
     title = {Forcing with proper classes},
     journal = {Fundamenta Mathematicae},
     pages = {1--27},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {1973},
     doi = {10.4064/fm-81-1-1-27},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-81-1-1-27/}
}