@book { SouvernImSystemBuch5LitRPGSerie,
    title = "Souverän (Im System Buch #5): LitRPG-Serie",
    author = "Petr {Zhgulyov}",
    year = "2023",
    publisher = "Magic Dome Books",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1397767"
}