@article{SLC_1989_21_a10,
     author = {Hanno Lefmann},
     title = {Partitionsregul\"are {Gleichungssysteme}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1989},
     volume = {21},
     url = {http://geodesic.mathdoc.fr/item/SLC_1989_21_a10/}
}