1. Best, J.B., Howell, W., Riegel, V., et al., Cephalic Mechanism for Social Control of Fissioning in Planarians. Feedback Cue and Switching Characteristics, J. Neurobiol., 1974, vol. 5, pp. 421–442.
2. Bogorovskaya, G.I., Nervous System Regeneration in the Planaria, Tsitologiya, 1969, vol. 11, no. 8, pp. 964–972.
3. Kreshchenko, N.D., Pharynx Regeneration in Planarians, Ontogenez, 2009, vol. 40, no. 1, pp. 3–18 [Russ. J. Dev. Biol. (Engl. Transl.), 2009, vol. 40, no. 1, pp. 1–14].
4. Kreshchenko, N.D., Pharynx Regeneration in the Planarian Dugesia tigrina, Ontogenez, 1993, vol. 24, no. 1, pp. 66–71.
5. Morgan, T.H., Regeneration, London: MacMillan Co., 1901.