@article{AM2_1985__29_137082,
     author = {Roman Ger},
     title = {A consistency equation for three geometries.},
     journal = {Aequationes mathematicae},
     pages = {50--55},
     year = {1985},
     volume = {29},
     zbl = {0577.51016},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137082/}
}