%0 Journal Article %T Marriage, parenthood and social network: Subjective well-being and mental health in old age %A Christoph Becker %A Isadora Kirchmaier %A Stefan T. Trautmann %J Archive of "PLoS ONE". %D 2019 %R 10.1371/journal.pone.0218704 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6656342/