@article{MZ_1989__201_4_174066,
     author = {Dieter Happel and Luise Unger},
     title = {Factors of {Wild,} {Concealed} {Algebras.}},
     journal = {Mathematische Zeitschrift},
     pages = {477--484},
     publisher = {mathdoc},
     volume = {201},
     number = {4},
     year = {1989},
     zbl = {0648.16026},
     url = {http://geodesic.mathdoc.fr/item/MZ_1989__201_4_174066/}
}