Lester R.G. Cannon. Biology of Turbellaria and some Related Flatworms (Proceedings of the Seventh International Symposium on the Biology of the Turbellaria, held at Åbo/Turku, Finland, 17–22 June 1993). [s.l.] : Springer Science & Business Media, 2012. 316 s. Dostupné online.ISBN 978-94-011-0045-8. S. 17.