@book { SocialCapitalandtheHappinessofNations,
    title = "Social Capital and the Happiness of Nations",
    subtitle = "The Importance of Trust and Networks for Life Satisfaction in a Cross-National Perspective",
    author = "Christian {Kroll}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104867"
}