@article{MAN_1973__206_162520,
     author = {John J. Wavrik},
     title = {First {Order} {Completeness} {Theorems.}},
     journal = {Mathematische Annalen},
     pages = {249--264},
     year = {1973},
     volume = {206},
     zbl = {0249.32013},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__206_162520/}
}