@article{IM_1969__9_141999,
     author = {K. KIYEK},
     title = {Kohomologiegruppen und {Konstantenreduktion} in {Funktionenk\"orpern.}},
     journal = {Inventiones mathematicae},
     pages = {99--120},
     publisher = {mathdoc},
     volume = {9},
     year = {1969},
     zbl = {0188.25002},
     url = {http://geodesic.mathdoc.fr/item/IM_1969__9_141999/}
}