@article {7343,
	title = {Marine latitudinal diversity gradients: tests of causal hypotheses},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {95},
	year = {1998},
	note = {PDF},
	pages = {3699 {\textendash}3702},
	keywords = {biogeography, macroevolution, mollusca},
	author = {Roy, Kaustuv and Jablonski, David and Valentine, James W. and Rosenberg, Gary}
}
@article {7246,
	title = {A potential mediator of collagenous block copolymer gradients in mussel byssal threads},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {95},
	year = {1998},
	month = {September},
	pages = {10517-10522},
	keywords = {bivalvia, byssus, molecules, mollusca, mytilidae, mytilus},
	author = {Qin, Ziao-Xia and Waite, J. Herbert}
}
