@article{SLC_1986_14_a9,
     author = {Karl Erich Wolff},
     title = {Zur kombinatorischen {Bedeutung} der {Perron-Frobenius-Projektion}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {14},
     year = {1986},
     url = {http://geodesic.mathdoc.fr/item/SLC_1986_14_a9/}
}