1. 1. H. A. Staab, W. Rohr, and W. Foerst (1968 ) inNewer Methods of Preparative Organic Chemistry () vol. 5 , pp. 61 -108 , Academic Press, New York.
2. 2. M. Ravaux, M. Laloi-Diard, and M. Vilkas (1971 ) Tetrahedron Lett.4013 -4015 .
3. 3. H. Fraenkel-Conrat, and P. D. Boyer (1959 ) inThe Enzymes , 2nd edn () vol. 1 , pp. 589 -618 , Academic Press, New York.
4. THE CHEMICAL MODIFICATION OF CHYMOTRYPSIN
5. 5. G. P. Hess, and P. D. Boyer (1971 ) inThe Enzymes, 3d edn () vol. 3 , pp. 213 -248 , Academic Press, New York.