@article {2839, title = {Ein Besserungsversuch am System der Gramineen}, journal = {Beihefte zum Botanischen Centralblatt}, volume = {25}, year = {1909}, pages = {421-489}, keywords = {CLASSIFICATION}, author = {Krause, E. H. L.} } @article {2840, title = {Weitere Bessungeren am System der Gramineen}, journal = {Beihefte zum Botanischen Centralblatt}, volume = {27}, year = {1910}, pages = {412-424}, keywords = {CLASSIFICATION}, author = {Krause, E. H. L.} } @article {2841, title = {Beitrage zur Gramineen-Systematik}, journal = {Beihefte zum Botanischen Centralblatt}, volume = {30}, year = {1913}, pages = {111-123}, keywords = {CLASSIFICATION}, author = {Krause, E. H. L.} }