Reference

H. Kinosita, Stanislaw Dryl, Y. Naitoh (1964): Spontaneous change in membrane potential of Paramecium caudatum induced by Barium and Calcium ions – Bulletin de l Academie Polonaise des Sciences. (Cl.II Agrobiol.Biol.Sci.med. 1953-56). Serie des Sciences Biologiques. – 12(10): 459 - 461.