@article{AMLG_1964__7_137774,
     author = {Donald Monk},
     title = {Substitutionless {Predicate} {Logic} with {Identity.}},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {102--121},
     publisher = {mathdoc},
     volume = {7},
     year = {1964},
     zbl = {0158.24603},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1964__7_137774/}
}