Rotenburg:
Heinz Lemmermann: Bookwetenpannkoken. Schünemann, Bremen 1985, ISBN 3-7961-1720-1, page 79
Stader Geest:
Marcus Buck: attested by oral sources on the Stade Geest
Ostpommern:
Siegfried Splett: Niederdeutsche Mundart in der Komturei Schlochau. ISBN 978-3-8391-5560-8, Holzgerlingen 2010, page 55
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Plattmakers is a Low German dictionary that also provides translations in several languages. Get more infos.