@article {1423,
	title = {Comparative anatomy of internal incubational sacs in cupuladriid bryozoans and the evolution of brooding in free-living cheilostomes},
	journal = {Journal of Morphology},
	volume = {270},
	year = {2009},
	pages = {1413-1430},
	keywords = {Internal brood sac},
	author = {Ostrovsky, Andrew N. and O{\textquoteright}Dea, Aaron and Rodriguez, Felix}
}
