@article{AMLG_1987__26_138049,
     author = {M.W. Bunder},
     title = {Some generalizations to two systems of set theory based on combinatory logic.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {5--12},
     publisher = {mathdoc},
     volume = {26},
     year = {1987},
     zbl = {0617.03004},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1987__26_138049/}
}