1. Arnold, H., Bourseaux, F., Brock, N. Naturwiss 45, 64 (1958).
2. Arnold, H., Bourseaux, F., Brock, N. Drug Res. 11, 143, (1961).
3. Brock, N. vth Int. Congress of Chemotherapy, Vol 11/1, 1967 p.155.
4. Brock, N. Med. Mschr. 27, 390 (1973)
5. Brock, N. Symposium Chester Beatty Research Institute, London July 1975.