British Planarians: Platyhelminthes: Tricladida: keys and notes for identification of the species
Ball, I.R.; Reynoldson, T.B. (1981). British Planarians: Platyhelminthes: Tricladida: keys and notes for identification of the species. Synopses of the British Fauna, N.S. 19. Cambridge University Press: Cambridge. ISBN 0-521-28272-1. 141 pp.
Part of: Barnes, R.S.K.; Crothers, J.H. (Ed.) Synopses of the British Fauna. Linnean Society of London: London; New York. ISSN 0082-1101, more
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