(在威斯特法伦) 在荷兰东部: Kollumerlands (a Frisian/Plattdüütsch mixture dialect in Groningen and Fryslân) Gronings (on Frisian substrate) Noord-Gronings (in Groningen)
ISBN 978-83-232-2296-5. (原始内容存档 (PDF)于2015-04-02). Hoekstra, Jarich, Frisian. Standardization in progress of a language in decay, Germanic Standardizations
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (编). Middle Low German. Glottolog 2.7. Jena: Max Planck Institute for the Science of