@article{GDZPPN002046040,
title = {Model existence theorem in superrelevant predicate logics.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {26},
year = {1987},
pages = {111-122},
zbl = {0641.03015},
url = {http://dml.mathdoc.fr/item/GDZPPN002046040}
}
Szatkowski, Miroslaw. Model existence theorem in superrelevant predicate logics.. Archiv für mathematische Logik und Grundlagenforschung, Tome 26 (1987) pp. 111-122. http://gdmltest.u-ga.fr/item/GDZPPN002046040/