@article{SLC_1989_21_a2,
     author = {Torsten Sillke},
     title = {Zur {Kombinatorik} von {Permutationen}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1989},
     volume = {21},
     url = {http://geodesic.mathdoc.fr/item/SLC_1989_21_a2/}
}