@article{MZ_1972__126_171716,
     author = {Otto Bachmann},
     title = {Planare {Neok\"orper} mit additiven {K\"urzungsregeln.}},
     journal = {Mathematische Zeitschrift},
     pages = {6--30},
     publisher = {mathdoc},
     volume = {126},
     year = {1972},
     zbl = {0219.50015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__126_171716/}
}