By Jeremy Rifkin
By Shelton, Mr Chris
By Douglas E. Comer
By James P. Landers (University of Virginia, Charlottesville, USA)
By K.J. Bohlman
By Lionel Warnes
By Richard Rhodes
By Mary Ellen Latschar
By R. A. Penfold
By Howard, David, Angus, Jamie
By Sadiku, Matthew N. O.
By Brian Henderson (University College London), Petra C. F. Oyston (Defence Science and Technology Laboratory, Salisbury)
By M.L. Shannon
By O.N. Bishop