@article{AKGWG_1843__1_135630,
     author = {Arnold Adolph Berthold},
     title = {Ueber den {Bau} des {Wasserkalbes} {(Gordius} aquaticus)},
     journal = {Abhandlungen der K\"oniglichen Gesellschaft der Wissenschaften in G\"ottingen},
     pages = {1--18},
     publisher = {mathdoc},
     volume = {1},
     year = {1843},
     url = {http://geodesic.mathdoc.fr/item/AKGWG_1843__1_135630/}
}