@article{BAG_1989__29_138436,
     author = {E. BOHNE and R. M\"OLLER},
     title = {Zur {Entwicklung} der {Beleuchtungsgeometrie}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {7--20},
     publisher = {mathdoc},
     volume = {29},
     year = {1989},
     zbl = {0704.51017},
     url = {http://geodesic.mathdoc.fr/item/BAG_1989__29_138436/}
}