1. Ashida, J.: Studies on the leaf movement of Aldrovanda vesiculosa L. I. Process and mechanism of the movement. Mem. Coll. Sci., Kyoto Imp. Univ., Ser. B, 9, 141?244 (1934).
2. Ashida, J.: Studies on the leaf movement of Aldovanda vesiculosa L. II. Effects of mechanical, electrical, thermal, osmotic and chemical influences. Mem. Coll. Sci., Kyoto Imp. Univ., Ser. B, 11, 55?113 (1935).
3. Behre, K.: Physiologische und zytologische Untersuchungen über Drosera. Planta (Berl.) 7, 208?306 (1929).
4. Benolken, R. M., Jacobson, S. L.: Response properties of a sensory hair exised from Venus's flytrap. J. gen. Physiol. 56, 64?82 (1970).
5. Bose, J. C.: Comparative electro-physiology. London: Longmans, Green 1907.