1. M. Florkin, in: Biochemistry of Insects, p. 63. Ed. L. Levenbook. Pergamon Press, London 1959.
2. D. Gilmour, The Biochemistry of Insects. Academic Press, New York 1961.
3. D. Gilmour, The Metabolism of Insects. Oliver and Boyd, London 1965.
4. G.R. Wyatt, A. Rev. Ent.6, 75, (1961).
5. P.S. Chen, in: Amino Acid Pools, p. 115. Ed. J.T. Holden. Elsevier, Amsterdam 1962.