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Umberson D, Williams K, Powers DA, Liu H, Needham B.Umberson D, et al. Among authors: powers da.J Marriage Fam. 2005 Dec;67(5):1332-1347. doi: 10.1111/j.1741-3737.2005.00220.x.J Marriage Fam. 2005.PMID: 21818160Free PMC article.
Umberson D, Williams K, Powers DA, Liu H, Needham B.Umberson D, et al. Among authors: powers da.J Health Soc Behav. 2006 Mar;47(1):1-16. doi: 10.1177/002214650604700101.J Health Soc Behav. 2006.PMID: 16583772Free PMC article.