Bibliographical sources mentioned in these texts:
Annonius Monachus 92.17
Chytræus, David : Saxon History 92.18
Crantzius, Albertus 92.2, 92.15, 92.17; : Chronicle of Saxony Bk.5 Ch.27: 92.11,
Dryander, Ioannes is mentioned in the cartouche of the Hassiæ half sheet map as its maker, Ort92a
Helmoldus 92.15
Hessus, Eobanus 92.4
Iordanus, Marcus is mentioned in the cartouche of the half sheet map of Holsatiæ as its maker, Ort92b