@article{RCM_1985__19_181753,
     author = {Jerome Malitz},
     title = {Languages {Extending} {L} {(Q).}},
     journal = {Revista colombiana de matematicas},
     pages = {163--172},
     publisher = {mathdoc},
     volume = {19},
     year = {1985},
     zbl = {0615.03017},
     url = {http://geodesic.mathdoc.fr/item/RCM_1985__19_181753/}
}