(1) D. T. Osuga and R. E. Feeney: “Food Proteins,” ed. by J. R. Whitaker and S. R. Tannenbaum, Avi Publishing Company, Inc. Westpoint, Connecticut, 1977, p. 209.
(2) S. P. L. Soerensen and M. Hoyrup: C. R. Trav. Lab. Carsberg, 29, 12 (1915-1917).
(3) E. Barbu and M. Joly: Discuss. Faraday Soc., 13, 77 (1953).
(4) M. P. Tombs: Faraday Discuss. Chem. Soc. 57, 158 (1974).