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@article{MAN_1992__293_4_164970, author = {William J. Floyd}, title = {Growth of planar {Coxeter} groups, {P.V.} numbers, and {Salem} numbers.}, journal = {Mathematische Annalen}, pages = {475--484}, publisher = {mathdoc}, volume = {293}, number = {4}, year = {1992}, zbl = {0735.51016}, url = {http://geodesic.mathdoc.fr/item/MAN_1992__293_4_164970/} }
William J. Floyd. Growth of planar Coxeter groups, P.V. numbers, and Salem numbers.. Mathematische Annalen, Tome 293 (1992) no. 4, pp. 475-484. http://geodesic.mathdoc.fr/item/MAN_1992__293_4_164970/