@article{AMLG_1974__16_137895,
     author = {N. Georgieva},
     title = {An extension of the {Kreisel-Putman} system.},
     journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
     pages = {187--190},
     publisher = {mathdoc},
     volume = {16},
     year = {1974},
     zbl = {0289.02014},
     url = {http://geodesic.mathdoc.fr/item/AMLG_1974__16_137895/}
}