@book {50,
	title = {Lichen Flora of the Greater Sonoran Desert Region},
	volume = {1},
	year = {2001},
	publisher = {Lichens Unlimited},
	organization = {Lichens Unlimited},
	address = {Tempe},
	author = {Thomas H. Nash_III and Bruce D. Ryan and Corinna Gries and Frank Bungartz}
}
@article {1155,
	title = {Cyanolichens of the Galapagos Islands- The genera Collema and Leptogium},
	journal = {Sauteria},
	volume = {15},
	year = {2008},
	pages = {139-158},
	chapter = {139},
	author = {Frank Bungartz}
}
