@book { CalledtoGrow,
    title = "Called to Grow",
    subtitle = "Brokenness and Gradual Growth towards Wholeness",
    author = "Markus {Schmidt}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1109014"
}