@article {Tapper1992, title = {Demography of persistent juveniles in Fraxinus excelsior}, journal = {Ecography}, volume = {15}, number = {4}, year = {1992}, pages = {385{\textendash}392}, url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0587.1992.tb00048.x/abstract}, author = {Tapper, PG} }