Heimbach-Steins, M. “Ehe - Partnerschaft - Familie: Kirche in Einem Schwierigen Lernprozess: Marriage - Partnership - Family: The Church in a Difficult Learning Process”. Journal of Family Research, vol. 11, no. 1, Apr. 1999, pp. p. 5-20, https://ubp.uni-bamberg.de/jfr/index.php/jfr/article/view/516.