@article{PORMA_1958__17_3_114803,
     author = {Schneider, Hubert H.},
     title = {Semantics of the predicate calculus with identity and the validity in the empty individual-domain},
     journal = {Portugaliae mathematica},
     pages = {85--96},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1958},
     zbl = {0084.24703},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1958__17_3_114803/}
}