@article {3230,
	title = {Roles of synorganisation, zygomorphy and heterotopy in floral evolution: the gynostemium and labellum of orchids and other lilioid monocots},
	journal = {Biol. Rev.},
	volume = {77},
	year = {2002},
	month = {2002///},
	pages = {403 - 441},
	author = {Rudall, P. J. and Bateman, R. M.}
}
@article {3216,
	title = {Diversity and classification of mycorrhizal associations},
	journal = {Biol. Rev.},
	volume = {79},
	year = {2004},
	month = {2004///},
	pages = {473 - 495},
	author = {Brundrett, M. C.}
}
@article {2797,
	title = {Carbohydrate movement from autotrophs to heterotrophs in parasitic and mutualistic symbiosis},
	journal = {Biol. Rev.},
	volume = {44},
	year = {1969},
	month = {1969///},
	pages = {17 - 90},
	author = {Smith, D. and Muscatine, L. and Lewis, D.}
}
@article {2787,
	title = {Concepts in fungal nutrition and the origin of biotrophy},
	journal = {Biol. Rev.},
	volume = {48},
	year = {1973},
	month = {1973///},
	pages = {261 - 278},
	author = {Lewis, D. H.}
}
