Young, J O. 1972. ?Further Studies On The Occurrence Of Freshwater Microturbellaria In The British Isles. Ii. New Records And An Emedation To The Existing Key For The Group?. Freshwater Biology 2. Freshwater Biology: 355-359.

Young, J O. 1972. ?Further Studies On The Occurrence Of Freshwater Microturbellaria In The British Isles. I. A Description Of Macrostomum Johni Sp. Nov.?. Freshwater Biology 2. Freshwater Biology: 253-258.