@book { SchreibenanrussischenunddeutschenSchulen,
    title = "Schreiben an russischen und deutschen Schulen",
    author = "Irina {Ezhova-Heer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105651"
}