@article {KNZ00320,
	title = {Mycorrhizas and root architecture},
	journal = {Experientia},
	volume = {47},
	year = {1991},
	pages = {355 -361},
	keywords = {LTER-KNZ},
	doi = {10.1007/BF01972077},
	author = {Hetrick, B.A.D.}
}
