Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1998_37_6_a0, author = {P. de la Harpe and R. I. Grigorchuk}, title = {Local convexity of growth functions of finitely generated}, journal = {Algebra i logika}, pages = {621--626}, publisher = {mathdoc}, volume = {37}, number = {6}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1998_37_6_a0/} }
P. de la Harpe; R. I. Grigorchuk. Local convexity of growth functions of finitely generated. Algebra i logika, Tome 37 (1998) no. 6, pp. 621-626. http://geodesic.mathdoc.fr/item/AL_1998_37_6_a0/