@article{MZ_1971__120_171533,
     author = {Karl-Heinz Kiyek},
     title = {Zur {Berechnung} von {Ext} bei {Moduln} \"uber {Polynomringen.}},
     journal = {Mathematische Zeitschrift},
     pages = {318--322},
     publisher = {mathdoc},
     volume = {120},
     year = {1971},
     zbl = {0203.34704},
     url = {http://geodesic.mathdoc.fr/item/MZ_1971__120_171533/}
}