Template:Ax et al. 1978

• Ax, P., Weidemann, E. & Ehlers, B. 1978. Zur Morphologie sublitoraler Otoplanidae (Turbellaria, Proseriata) von Helgoland und Neapel [On the morphology of sublittoral Otoplanidae (Turbellaria, Proseriata) from Helogoland and Naples]. Zoomorphologie 90: 113–133. DOI: 10.1007/BF02568679 .  
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