@article {1156,
	title = {Physiological-Environmental Interactions in Lichens XIII. Seasonal constancy of Nitrogenase Activity, Net Photosynthesis and Respiration, in Collema furfuraceum (Am.)Dr.},
	journal = {New Phytologist},
	volume = {90},
	year = {1982},
	pages = {723-734},
	chapter = {723},
	author = {K.A. Kershaw and J.D. MacFarlane}
}
