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Ax, Peter, and Werner  Armonies. 1990. ?Brackish Water Platyhelminthes From Alaska As Evidence For The Existence Of A Boreal Brackish Water Community With Circumpolar Distribution?. Microfauna Marina 6. Microfauna Marina: 7-109.

Armonies, Werner, and Monika  Hellwig. 1987. ?Neue Plathelminthes Aus Dem Brackwasser Der Insel Sylt (Nordsee)?. Microfauna Marina 3. Microfauna Marina: 249-260.