@article{PORMA_1961__20_2_114856,
     author = {Schneider, Hubert H.},
     title = {A syntactical characterization of the predicate calculus with identity and the validity in all individual-domains},
     journal = {Portugaliae mathematica},
     pages = {105--117},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1961},
     mrnumber = {0186533},
     zbl = {0097.24502},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1961__20_2_114856/}
}