@article {714,
	title = {Ozone stimulates protonematal growth and gametophore production in Polytrichum commune},
	journal = {Bryologist},
	volume = {102},
	year = {1999},
	pages = {398-403},
	author = {Petersen, R. and Bosley, A. and Rebbeck, J.}
}
@article {514,
	title = {The resistance of the moss Polytrichum commune to acute exposure of simulated acid rain or ozone compared to two fern species: Spore germination},
	journal = {Bryologist},
	volume = {101},
	year = {1999},
	pages = {512-518},
	author = {Bosley, A. and Petersen, R. and Rebbeck, J.}
}
