Paper  bibtex   

@incollection{van_ooststroom_convolvulaceae_1953,
	address = {Djakarta},
	series = {1},
	title = {Convolvulaceae},
	volume = {4},
	copyright = {Contributed by Mertz Library, The New York Botanical Garden},
	shorttitle = {-},
	url = {http://biodiversitylibrary.org/page/28682917},
	language = {English},
	number = {4},
	booktitle = {Flora {Malesiana}},
	publisher = {Noordhoff-Kolff N.V.},
	author = {van Ooststroom, S.J.},
	collaborator = {Hoogland, Ruurd D.},
	year = {1953},
	pages = {388--512},
}