@article{GDZPPN002087111, title = {Homotopieklassen von Idealbasen in Steinschen Algebren.}, journal = {Inventiones mathematicae}, volume = {5}, year = {1968}, pages = {255-276}, zbl = {0157.13302}, url = {http://dml.mathdoc.fr/item/GDZPPN002087111} }
FORSTER, O.; RAMSPOTT, K.J. Homotopieklassen von Idealbasen in Steinschen Algebren.. Inventiones mathematicae, Tome 5 (1968) pp. 255-276. http://gdmltest.u-ga.fr/item/GDZPPN002087111/