@article{04057631, title = {Invariants of number fields related to central embedding problems.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {13}, year = {1990}, pages = {199-200}, doi = {10.1155/S0161171290000291}, zbl = {0648.12008}, language = {en}, url = {http://dml.mathdoc.fr/item/04057631} }
Opolka, H. Invariants of number fields related to central embedding problems.. International Journal of Mathematics and Mathematical Sciences, Tome 13 (1990) pp. 199-200. doi : 10.1155/S0161171290000291. http://gdmltest.u-ga.fr/item/04057631/