Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1971_15_6_a6, author = {S. Feferman and C. Spector}, title = {Incompleteness along paths in progressions of theories}, journal = {Matematika}, pages = {159--166}, publisher = {mathdoc}, volume = {15}, number = {6}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1971_15_6_a6/} }
S. Feferman; C. Spector. Incompleteness along paths in progressions of theories. Matematika, Tome 15 (1971) no. 6, pp. 159-166. http://geodesic.mathdoc.fr/item/MAT_1971_15_6_a6/