@article{1256053748, author = {Fried, Michael D. and MacRae, R. E.}, title = {On the invariance of chains of fields}, journal = {Illinois J. Math.}, volume = {13}, number = {4}, year = {1969}, pages = { 165-171}, language = {en}, url = {http://dml.mathdoc.fr/item/1256053748} }
Fried, Michael D.; MacRae, R. E. On the invariance of chains of fields. Illinois J. Math., Tome 13 (1969) no. 4, pp. 165-171. http://gdmltest.u-ga.fr/item/1256053748/