@article{05348110, title = {Goodstein's function.}, journal = {Revista Colombiana de Matem\'aticas}, volume = {41}, year = {2007}, pages = {381-391}, zbl = {1156.03053}, language = {en}, url = {http://dml.mathdoc.fr/item/05348110} }
Caicedo, Andrés Eduardo. Goodstein's function.. Revista Colombiana de Matemáticas, Tome 41 (2007) pp. 381-391. http://gdmltest.u-ga.fr/item/05348110/