1. Agate, A. D. and Vishniac, W.: 1972,Chem. Phys. Lipids 9, 247.
2. Bahadur, K.: 1972,Zbl. Bakt. 127, 643.
3. Bahadur, K.: 1973,Indiana Nat. Sci. Acad. 39B, 455.
4. Bangham, A. D.: 1968,Prog. Biophys. Mol. Biol. 18, 29.
5. Bar-Nun, A., Bar-Nun, N., Baver, S. H., and Sagan, C.: 1971, inMolecular Evolution, Vol. I, R. Buvet and C. Ponnamperuma (eds.), American Elsevier of New York, p. 114.