Kerstis Birgitta, Engström Gabriella, Sundquist Kristina, Widarsson Margareta, and Rosenblad Andreas. 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). https://doi.org/10.3109/03009734.2012.684805.