@article{SLC_1984_10_a18,
     author = {Klaus Leeb and Giuseppe Pirillo},
     title = {All the shuffle-compatible graded orderings of 0-1-words},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {10},
     year = {1984},
     url = {http://geodesic.mathdoc.fr/item/SLC_1984_10_a18/}
}