@article{SLC_1988_19_a6,
     author = {Robert Tichy},
     title = {Graphentheoretische {Abz\"ahlprobleme}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1988},
     volume = {19},
     url = {http://geodesic.mathdoc.fr/item/SLC_1988_19_a6/}
}