@book { ExistenceasPrayer,
    title = "Existence as Prayer",
    author = "Mark L. {Yenson}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-1192-1",
    url = "https://www.peterlang.com/document/1051348"
}