@article{SLC_1981_05_a10,
     author = {Ulrich Faigle},
     title = {The {Greedy} {Algorithm} as a {Combinatorial} {Principle}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {05},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/SLC_1981_05_a10/}
}