Paper  bibtex   

@article{yatsckievych_taxonomic_1984,
	title = {A taxonomic study of {Ipomoea} tenuiloba torrey ({Convolvulaceae}) with notes on related species},
	volume = {31},
	url = {https://www.jstor.org/stable/41424479},
	language = {English},
	number = {2},
	journal = {Madroño},
	author = {Yatsckievych, George and Mason Jr., Charles T.},
	month = apr,
	year = {1984},
	pages = {102--108}
}