@article{MZ_1995__218_4_174740,
     author = {Karin Erdmann},
     title = {Ext1 for {Eyl} modules of {SL2} {(K).}},
     journal = {Mathematische Zeitschrift},
     pages = {447--460},
     publisher = {mathdoc},
     volume = {218},
     number = {4},
     year = {1995},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__218_4_174740/}
}