@article{MZ_1984__186_173440,
     author = {Friedrich Hegenbarth and Artur Heil},
     title = {Exotic {Characteristic} {Classes} and {Their} {Relation} to {Universal} {Surgery} {Classes.}},
     journal = {Mathematische Zeitschrift},
     pages = {211--222},
     year = {1984},
     volume = {186},
     zbl = {0554.55009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173440/}
}