@article{GDZPPN002488248, title = {Relative Newton Numbers.}, journal = {Monatshefte f\"ur Mathematik}, volume = {114}, year = {1992}, pages = {149-160}, zbl = {0765.52016}, url = {http://dml.mathdoc.fr/item/GDZPPN002488248} }
Wegner, Gerd. Relative Newton Numbers.. Monatshefte für Mathematik, Tome 114 (1992) pp. 149-160. http://gdmltest.u-ga.fr/item/GDZPPN002488248/