“11 APPENDIX B - CLASSIFICATION OF PRUZZISCHE VOKABELN 11.1. Classification by number and word count 11.2 Statistical overview 11.3 Words of Uncertain Origin 11.3.1 Introductory remarks 11.3.2 Different types of uncertainties 11.4 Summary of findings” (2017) Otago German Studies, 25. doi:10.11157/ogs-vol25id330.