@article{MZ_1978__164_172777,
     author = {Armin Frei and Heinrich Kleisli},
     title = {Shape {Invariant} {Functors:} {Application} in {Module-Theory.}},
     journal = {Mathematische Zeitschrift},
     pages = {179--184},
     year = {1978},
     volume = {164},
     zbl = {0392.18010},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__164_172777/}
}