@article{AMLG_1987__26_138055,
     author = {Miroslaw Szatkowski},
     title = {Model existence theorem in superrelevant predicate logics.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {111--122},
     publisher = {mathdoc},
     volume = {26},
     year = {1987},
     zbl = {0641.03015},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1987__26_138055/}
}