@book { DiePhonologiederdeutschenLehnwrterimAltpolnischenbis1500,
    title = "Die Phonologie der deutschen Lehnwörter im Altpolnischen bis 1500",
    author = "Eckhard {Eggers}",
    year = "1988",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12732",
    url = "https://www.peterlang.com/document/1067132"
}