1. Frey-Wyssling undv. Rechenberg-Ernst, Über die Wasserpermeabilität der Epithelzellen von Hydrathoden, Flora37, 193 (1943).
2. Jacobs undStewart, A simple method for the quantitative measurement of cell permeability, J. cell. comp. Physiology1, 75 (1932).
3. V. Wartiovaara, The permeability ofTolypellopsis cells for heavy water and methyl alcohol, Acta bot. fennica34, 1 (1944).
4. Davson andDanielli, The permeability of natural membranes, p. 117, Cambridge, University Press 1943.
5. Fr. Bachmann, Zur Analyse von Permeabilitätsmessungen, Planta (Berlin)30, 224 (1939).