@article {BellCoonsHare15,
	title = {Growth degree classification for finitely generated semigroups of integer matrices},
	journal = {Semigroup Forum},
	volume = {92},
	year = {2016},
	note = {18 pages},
	pages = {23-44},
	url = {http://link.springer.com/article/10.1007/s00233-015-9725-1},
	author = {Jason P. Bell and Michael Coons and Kevin G. Hare}
}
