Isaac Asimov, George Zebrowski, Martin H. Greenberg, James E. Gunn, Steven Weinberg, Stanisław Lem, Clifford D. Simak, Gregory Benford, Laurence Manning, Brian W. Aldiss, A. E. van Vogt, Carl Sagan, Arthur C. Clarke, Raymond Z. Gallun, Eric Frank Russell, H. G. Wells, Chad Oliver, Theodore L. Thomas, Richard McKenna and Ian Watson
