@article{MM2_1983__44_154957,
     author = {Michael H\"oppner},
     title = {A {Note} on the {Structure} of {Injective} {Diagrams.}},
     journal = {Manuscripta mathematica},
     pages = {45--50},
     publisher = {mathdoc},
     volume = {44},
     year = {1983},
     zbl = {0517.18006},
     url = {http://geodesic.mathdoc.fr/item/MM2_1983__44_154957/}
}