Ax, Peter. 1994. ?Macrostomum Magnacurvituba N. Sp. (Macrostomida, Plathelminthes) Replaces Macrostomum Curvituba In Coastal Waters Of Greenland And Iceland?. Microfauna Marina 9. Microfauna Marina: 335-338.

Ax, Peter. 1995. ?Platyhelminthes Aus Dem Eulittoral Von Godhavn (Disko, Grönland)?. Microfauna Marina 10. Microfauna Marina: 249-294.

Ax, Peter, and Werner  Armonies. 1987. ?Amphiatlantic Identities In The Composition Of The Boreal Brackish Water Community Of Plathelminthes. A Comparison Between The Canadian And European Atlantic Coast?. Microfauna Marina 3. Microfauna Marina: 7-80.

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.