@article{Wiik2012,
author = "Kenneth Aarskaug Wiik and Renske Keizer and Trude Lappegård",
title = "Relationship Quality in Marital and Cohabiting Unions Across Europe",
year = 2012,
journal = "Journal of Marriage and Family",
volume = 74 (3),
pages = "389–398",
month = "Jun",
url = "http://onlinelibrary.wiley.com/doi/10.1111/j.1741-3737.2012.00967.x/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false"
}