@article {litwin2011association,
	title = {The association of background and network type among older Americans: Is {\textquotedblleft}who you are{\textquotedblright} related to {\textquotedblleft}who you are with{\textquotedblright}?},
	journal = {Research on Aging},
	volume = {33},
	number = {6},
	year = {2011},
	pages = {735{\textendash}759},
	publisher = {Sage Publications Sage CA: Los Angeles, CA},
	author = {Litwin, Howard and Shiovitz-Ezra, Sharon}
}
