@inbook {Childress2004,
	title = {{On the edge of a deep biosphere: Real animals in extreme environments}},
	booktitle = {Subseafloor Biosphere at Mid-Ocean Ridges},
	year = {2004},
	pages = {41{\textendash}49},
	publisher = {AGU},
	organization = {AGU},
	doi = {10.1029/144GM04},
	author = {Childress, J J and Fisher, C R and Felbeck, H and Girguis, P and Girguis, P R}
}
@article {Distel1994,
	title = {{Evidence for phylogenetic congruence among sulfur-oxidizing chemoautotrophic bacterial endosymbionts and their bivalve hosts}},
	journal = {Journal of Molecular Evolution},
	volume = {38},
	number = {5},
	year = {1994},
	pages = {533{\textendash}543},
	issn = {0022-2844},
	doi = {10.1007/BF00178852},
	url = {http://dx.doi.org/10.1007/BF00178852},
	author = {Distel, D L and Felbeck, H and Cavanaugh, C M}
}
