1. B.F. Issell, F.M. Muggia and S.K. Carter (eds): Etoposide (VP-16), current status and new developments. Academic Press, Orlando 1984.
2. M.G. Kelly and J.L. Hartwell: J. natl Cancer Inst. 14, 961 (1954).
3. I.W. Kaplan: New Orleans Med. Surg. J. 94, 388 (1942).
4. L.S. King and M. Sullivan: Science 104, 244 (1946).
5. V. Podwyssotzki: Arch. exp. Path. Pharmac. 13, 29 (1880).