Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1971__28_166186, author = {A. Ehrenfeucht and G. Fuhrken}, title = {On {Models} with {Undefinable} {Elements.}}, journal = {Mathematica Scandinavica}, pages = {325--328}, publisher = {mathdoc}, volume = {28}, year = {1971}, zbl = {0236.02041}, url = {http://geodesic.mathdoc.fr/item/MS2_1971__28_166186/} }
A. Ehrenfeucht; G. Fuhrken. On Models with Undefinable Elements.. Mathematica Scandinavica, Tome 28 (1971), pp. 325-328. http://geodesic.mathdoc.fr/item/MS2_1971__28_166186/