1. BLOCK, R.G., E.L. DURRUM and G. ZWEIG, 1958. A manual of paper chromatography and paper electrophoresis. Academic Press Inc. Publishers, New York.
2. FOWDEN, L., 1951. Amino acids of certain algae. Nature, 167:1030–1031.
3. HASHEN, M. and W. ESCHRICH, 1969. The mechanism of resistance of some varieties ofVicia faba towards the infection withFusarium oxysporum. Flora, 159:164–166.
4. JEFFRIES, H., 1969. Seasonal composition of temperature plankton communities: free amino acids. Limnol. Oceanogr., 14:41–52.
5. LEWIS, I.M., 1972. Studies on free and combined amino acid composition in some blue green algae. Phykos., 11:50–58.