Kerstis , B., Engström , G., Sundquist , K., Widarsson , M. and Rosenblad , A. (2012) “The association between perceived relationship discord at childbirth and parental postpartum depressive symptoms: a comparison of mothers and fathers in Sweden”, Upsala Journal of Medical Sciences, 117(4). doi: 10.3109/03009734.2012.684805.