@article{AMLG_1985__25_138034,
     author = {Peter Zahn},
     title = {Gilt das {Lemma} von {K\"onig} },
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {33--36},
     publisher = {mathdoc},
     volume = {25},
     year = {1985},
     zbl = {0588.03039},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1985__25_138034/}
}