@article{IM_1968__5_141921,
     author = {O. FORSTER and K.J. RAMSPOTT},
     title = {Homotopieklassen von {Idealbasen} in {Steinschen} {Algebren.}},
     journal = {Inventiones mathematicae},
     pages = {255--276},
     publisher = {mathdoc},
     volume = {5},
     year = {1968},
     zbl = {0157.13302},
     url = {http://geodesic.mathdoc.fr/item/IM_1968__5_141921/}
}