1. (a) Ugi, I. Angew. Chem. Int. Ed. 1962, 1, 8-21.
2. Marquarding, D. Liebigs Ann. Chem. 1967, 709, 1-10.
3. Kaufhold, G. Ann. 1967, 709, 11-28
4. Pergamon: Oxford, 1991, Vol. 2, 1083. (Review)
5. Ugi, I. Angew. Chem. Int. Ed. 2000, 39, 3168. (Review)