@article{MZ_1982__180_173210,
     author = {Erik Kjaer Petersen},
     title = {Geometrically {Defined} {Transfers,} {Comparisons.}},
     journal = {Mathematische Zeitschrift},
     pages = {535--544},
     year = {1982},
     volume = {180},
     zbl = {0511.55015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__180_173210/}
}