TY - JOUR A1 - Hiekel, N. A1 - Liefbroer, A.C. A1 - Poortman, A.R. T1 - Marriage and separation risks among German cohabiters: Differences between types of cohabiter Y1 - 2015 DO - 10.1080/00324728.2015.1037334 VL - 69 IS - 2 ER -