@article {638,
	title = {The Oxygen Tension within Lichen Thalli},
	journal = {New Phytologist},
	volume = {79},
	number = {3},
	year = {1977},
	month = {11/1977},
	pages = {649-657},
	chapter = {649},
	url = {http://www.jstor.org/stable/pdfplus/2433693.pdf},
	author = {J.W. Millbank}
}
@article {130,
	title = {Nitrogen Metabolism in Lichens. VII. Nitrogenase Activity and Heterocyst Frequency in Lichens with Blue-Green Phycobionts},
	journal = {New Phytologist},
	volume = {75},
	number = {2},
	year = {1975},
	pages = {239-244},
	chapter = {239},
	url = {http://www.jstor.org/stable/2430715},
	author = {C.J.B. Hitch and J.W. Millbank}
}
