1. Pres. George H.W. Bush, Press Conference, White House, 7 Nov. 1989.
2. Queen Elizabeth II, Christmas Message to Children 1989.
3. K. Niu, Fusion Energy, Cambridge University Press 1989.
4. C.-J. Winter, Physik. Blatter 45, 264 (1989).
5. James E. Quinn et al, General Electric, San Jose, Cf., Prospectus for Fission Reaction