@article{GDZPPN002109670, title = {Polynomial periodicity for Betti numbers of covering surfaces.}, journal = {Inventiones mathematicae}, volume = {110}, year = {1992}, pages = {289-322}, zbl = {0776.14002}, url = {http://dml.mathdoc.fr/item/GDZPPN002109670} }
Hironaka, Eriko. Polynomial periodicity for Betti numbers of covering surfaces.. Inventiones mathematicae, Tome 110 (1992) pp. 289-322. http://gdmltest.u-ga.fr/item/GDZPPN002109670/