@article{MZ_1969__111_171182,
     author = {Benno Artmann},
     title = {Uniforme {Hjelmslev-Ebenen} und modulare {Verb\"ande.}},
     journal = {Mathematische Zeitschrift},
     pages = {15--45},
     publisher = {mathdoc},
     volume = {111},
     year = {1969},
     zbl = {0177.23902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1969__111_171182/}
}