@article {1791,
	title = {Studies on the morphology, taxonomy, and distribution of North American Triclad Turbellaria. VII. The two species confused under the name <i>Phagocata gracilis</i>, the validity of the generic name <i>Phagocata</i>},
	journal = {Transactions of the American Microscopical Society},
	volume = {56},
	year = {1937},
	pages = {298-310},
	author = {Libbie H. Hyman}
}
@article {1779,
	title = {Studies on Virginian triclads},
	journal = {Journal Elisha Mitchell Scientific Society},
	volume = {51},
	year = {1935},
	pages = {79-133},
	url = {http://dc.lib.unc.edu/cdm/ref/collection/jncas/id/1631},
	author = {Roman Kenk}
}
@article {1769,
	title = {Studies on the morphology, taxonomy, and distribution of North American Triclad Turbellaria. VIII. Some cave planarians of the United States},
	journal = {Transactions of the American Microscopical Society},
	volume = {56},
	year = {1937},
	month = {10/1937},
	pages = {457-477},
	doi = {10.2307/3222667 },
	url = {https://www.jstor.org/stable/3222667?seq=1$\#$page_scan_tab_contents},
	author = {Libbie H. Hyman}
}
@article {786,
	title = {A brief account of the fresh water species of Planariae inhabiting the United States},
	journal = {Proceedings of the Boston Society of Natural History},
	volume = {3},
	year = {1850},
	pages = {264-265},
	url = {http://www.biodiversitylibrary.org/item/35741$\#$page/272/mode/1up},
	author = {Charles Fr{\'e}d{\'e}ric Girard}
}
@article {347,
	title = {Description and anatomy of a new and curious subgenus of Planaria (Phagocata gracilis)},
	journal = {Proceedings of the Academy of Natural Sciences of Philadelphia},
	volume = {3},
	year = {1847},
	pages = {248-251},
	author = {Leidy, J.}
}
@article {629,
	title = {Index to the genera and species of the freshwater triclads (Turbellaria) of the world},
	number = {183},
	year = {1974},
	doi = {https://doi.org/10.5479/si.00810282.183},
	url = {https://repository.si.edu/handle/10088/5332},
	author = {Roman Kenk}
}
@article {762,
	title = {A laboratory study of substrate and temperature preferences of three species of freshwater planarians (Turbellaria: Tricladida)},
	journal = {Journal of the Tennessee Academy of Science},
	volume = {55},
	year = {1980},
	pages = {117-120},
	url = {http://iweb.tntech.edu/sstedman/JTAS\%2055-4.pdf},
	author = {Speight, D. C. and Chandler, C. M.}
}
