@article{SLC_1995_34_a8,
     author = {Christian Krattenthaler},
     title = {Counting nonintersecting lattice paths with turns},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1995},
     volume = {34},
     url = {http://geodesic.mathdoc.fr/item/SLC_1995_34_a8/}
}