Published in Proceedings of The Biological Society of Washington, in 1999, in volume 112, pages 19-39

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Published in Proceedings of the Biological Society of Washington (Proc.Biol.Soc.Wash.), in 1999, in volume 112, pages 70-93

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Published in Proc. Biol. Soc. Wash, in 1999, in volume 112, pages 793-803

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Published in Proceedings of The Biological Society of Washington, in 1999, in volume 112, issue 1, pages 1-18

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Published in Proceedings of The Biological Society of Washington, in 1999, in volume 112, issue 2, pages 338-351

Published in Proceedings of the Biological Society of Washington, in 1999, in volume 112, issue 2, pages 410-432

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Published in Proceedings of The Biological Society of Washington, in 1999, in volume 112, issue 4, pages 787-792