@book { LifeCourageIce,
    title = "Life, Courage, Ice",
    subtitle = "A Semiological Essay on the Old Russian Biography of Aleksandr Nevskij",
    author = "Paul M. {Waszink}",
    year = "1990",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12248",
    url = "https://www.peterlang.com/document/1066770"
}